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Projects on Karma
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Projects on Karma
5,243 projects found
Librichain
Created on Nov 17, 2025
Librichain is a decentralized, blockchain-based platform designed to record and manage book lending and borrowing activities on-chain. The system eliminates the need for centralized library authorities by using smart contracts to automate trust, ensure transparency, and maintain an immutable ledger of book transactions.
In Librichain, every book is represented as a unique digital record (or token), and all lending, borrowing, and returning actions are securely stored on the blockchain. Thisā¦
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Tomato
Created on Nov 17, 2025
Tomato is a lightweight Solidity smart contract that serves as an immutable repository for storing completed work references such as IPFS CIDs, GitHub links, or any verifiable identifiers.
Once a submission is added, it is permanent, publicly viewable, and cannot be edited or deleted, ensuring full transparency and integrity.
This project is perfect for:
Developers and freelancers who want on-chain proof of work
Students submitting projects or assignments immutably
Teams tracking verifiedā¦
0 grants0 milestones0 roadmap items
HireFi
Created on Nov 17, 2025
https://github.com/132anisoni-create/Contract-HireFi
HireFi is a smart contract-based platform that enables trustless agreements between freelancers and clients.
By leveraging blockchain technology, HireFi ensures transparent, secure, and automatic payments without intermediaries.
Whether you're hiring a developer, a designer, or a consultant, HireFi makes freelancing safer and smarter.
0 grants0 milestones0 roadmap items
Ashu
Created on Nov 17, 2025
šļø DailyCheckIn ā Wallet-Based Attendance DApp
DailyCheckIn allows users to mark their daily attendance through their crypto wallet.
Each wallet address can check in once every 24 hours, and the record is stored permanently on-chain.
This project is ideal for beginners learning Solidity and exploring wallet authentication, timestamp validation, and on-chain record keeping.
It can easily be extended to build loyalty systems, streak trackers, or community engagementā¦
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chainspin
Created on Nov 17, 2025
Traditional online games often hide their random number generation and outcomes, leaving players uncertain about fairness.
chainspin solves that by putting the game logic on-chain, where every bet, random seed, and final result can be publicly verified.
This project was built as a learning and demo project for beginners to explore:
*Smart contract programming in Solidity.
*Blockchain randomness using commitāreveal.
*Event-driven architecture and provable outcome.
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XWallet
Created on Oct 28, 2025
XWallet is a decentralized shared wallet platform designed for families and organizations to manage finances collaboratively using stablecoins. It enables features like spend limits, reimbursements, role-based access, and controlled spendingāall while leveraging the stability and transparency of blockchain.
2 grants40 milestones0 roadmap items
celo-on-contract
Created on Nov 17, 2025
š©ŗ Patient Vitals On-Chain
A simple and transparent Solidity smart contract for recording and updating patient vital signs (like heart rate, temperature, and blood pressure) directly on the blockchain.
This project demonstrates how healthcare data can be made more secure, immutable, and decentralized using blockchain technology.
š Project Description
The Patient Vitals smart contract allows patients to record their vital signs on-chain.
Each patient is identified by their wallet address,ā¦
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votepoll
Created on Nov 17, 2025
This decentralized voting system is a blockchain-based application developed using Solidity to provide a secure, transparent, and tamper-resistant method for conducting elections. It allows users to cast votes that are permanently recorded on a distributed ledger, eliminating the risks associated with centralized databases. The system ensures fairness by preventing unauthorized access, duplicate voting, and data manipulation. Every action is validated through smart contracts, offeringā¦
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Attendance Validator
Created on Nov 17, 2025
A simple and transparent attendance validation system built on the Ethereum blockchain using Solidity.
This smart contract ensures that attendance records are immutable, tamper-proof, and verifiable ā perfect for institutions that value integrity and transparency.
Github repo link : https://github.com/Pmskabir1234/MyBlockChain
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Higher or Lower ā Simple Solidity Guessing Game
Created on Nov 17, 2025
Higher or Lower, a fun and beginner-friendly Solidity smart contract game!
This project helps you understand how to build, deploy, and interact with a simple on-chain guessing game using Ethereum smart contracts.
it is a simple smart contract where players guess if the next randomly generated number will be higher or lower than the current one.
project github link: https://github.com/aditisaha-ui/higherlower
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demo-one-celo
Created on Nov 17, 2025
š©ŗ Patient Vitals Record ā On-Chain Healthcare Data System
A simple and beginner-friendly Solidity smart contract that securely records and updates patient vitals (like heart rate, temperature, and blood pressure) on the blockchain.
š§ Project Description
This project demonstrates how blockchain technology can be used to make healthcare data transparent, secure, and immutable.
Built on Celo Sepolia Testnet, this smart contract allows hospitals or authorized entities to record and updateā¦
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CeloRit
Created on Nov 17, 2025
CertiChain is a Solidity-based smart contract designed for organizations (like universities, training centers, or certification bodies) that want to issue verifiable digital certificates on the blockchain.
It ensures that certificates are authentic, immutable, and easy to verify by anyone ā without relying on centralized systems.
GitHub link: https://github.com/RBDevScripts/CeloRit
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Gambler
Created on Nov 17, 2025
A simple Ethereum smart contract that simulates drawing random playing cards on the blockchain.
Each draw is transparent, recorded on-chain, and linked to the userās wallet address.
0 grants0 milestones0 roadmap items
Listify
Created on Nov 17, 2025
The Blockchain To-Do Manager is a decentralized, smart contract-powered task manager built with Solidity.
It helps you manage personal tasks securely and transparently on the Celo Sepolia Testnet š.
Simple, clean, and perfect for beginners learning blockchain development! š”
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Vega-Forest
Created on Nov 17, 2025
Humanity needs a green world that will contribute our life
1 grant0 milestones0 roadmap items
CareerChain
Created on Nov 17, 2025
JobApplicationTracker is a beginner-friendly Solidity smart contract that stores job applications immutably and records employer responses in an appendāonly history. Applications point to offāchain applicant data (for example an IPFS CID), while responses (status updates, interview invites, rejections, etc.) are appended by authorized responders and cannot be modified or removed.
This repository is ideal for anyone learning Solidity and building decentralised hiring tools, auditāfriendlyā¦
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InheritChain
Created on Nov 17, 2025
DigitalWill is a blockchain-based smart contract system that lets users create tamper-proof digital wills, deposit cryptocurrency, and automate inheritance distribution after a configurable inactivity period. It provides beneficiary management, a "proof of life" activity confirmation, personalized final messages, transparent event logging, and gas-efficient on-chain execution ā all without intermediaries.
Repository:ā¦
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DecentraRPS
Created on Nov 17, 2025
DecentraRPS is a decentralized Rock Paper Scissors game built on Solidity,allowing two players to compete by stakingERC-20 tokens. The gam ensures transparent,trustless,and automated outcomes without intermediaries. All moves,stakes,and results are securely recorded on-chain.
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Funfi
Created on Nov 17, 2025
**this project is build for the beginners learning solidiyty and celo block chain this program shows an output of Hello Blockchains**
https://github.com/ankan21042007-roy/contract.-funfi.sol
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CeloBloom
Created on Nov 16, 2025
CeloBloom is a blockchain-native donation + social platform on Celo where users create transparent campaigns, donate with cUSD, and grow a community through a Social-style feed ā all with WalletConnect, real-time tracking, and a bloom-themed mobile-first UI.
0 grants0 milestones0 roadmap items
VotingApp
Created on Nov 17, 2025
A decentralized voting application built using Solidity and deployed on the Celo Blockchain (Sepolia Testnet). This project enables secure, transparent, and tamper-proof voting by storing every vote on-chain. The contract allows the owner to add candidates, while users can vote only once, ensuring fairness and trust through blockchain technology.
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Celo Quiz Arena
Created on Nov 16, 2025
Celo Quiz Arena is a decentralized, interactive quiz platform built on the Celo blockchain, where users can participate in trivia games, learn about various topics, and earn rewards in cUSD or CELO.
1 grant3 milestones0 roadmap items
EmpowerFi
Created on Aug 29, 2025
EmpowerFi is a decentralized microfinance platform built on the CELO blockchain, designed to provide accessible, low-cost financial services to underserved communities. By leveraging CELOās mobile-first infrastructure and stablecoins (e.g., cUSD), EmpowerFi enables users to access microloans, savings pools, and financial literacy tools directly from their mobile phones, fostering economic empowerment in regions with limited banking infrastructure
4 grants0 milestones0 roadmap items
VOTE CHORI
Created on Nov 17, 2025
The VOTECHORI Project is a decentralized smart contract built to demonstrate how blockchain logic can automate and secure transactions without the need for intermediaries.
It serves as a great starting point for developers who want to understand how smart contracts work, how they are deployed, and how users can interact with them on-chain.
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Decentralized Smart Bank-Solidity Project
Created on Nov 17, 2025
This project is a** Decentralized Smart Bank** built on the Celo Sepolia Testnet using Solidity. It enables users to securely deposit and withdraw CELO directly on the blockchain without relying on traditional banks or centralized intermediaries. Built with transparency, immutability, and trustlessness in mind, the contract records every transaction on-chain and ensures secure fund management using a reentrancy guard. The system also supports direct ETH/CELO transfers and provides the ownerā¦
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Secure Notepad
Created on Nov 17, 2025
ecure Notepad is a decentralized notepad built on the Ethereum blockchain.
It allows users to write, edit, share, and manage their notes directly on-chain, ensuring transparency, immutability, and user ownership.
ā ļø Note: Blockchain data is public.
For real privacy, you should encrypt notes off-chain or store them on IPFS and save only the CID in the contract.
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first.sol
Created on Nov 17, 2025
DeckChain is a decentralized on-chain deck management system that allows users to create, shuffle, and draw cards securely using blockchain technology. Itās perfect for card-based games, NFT collectibles, or any decentralized app where fairness and transparency matter.
Every deck and card is stored on-chain, ensuring that game logic is verifiable, immutable, and tamper-proof. This project is designed for developers learning Solidity and decentralized game logic.
github link:ā¦
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jokes
Created on Nov 17, 2025
āThe ājokesā app showcases a collection of curated humorous content, aimed to brighten up the day of its users.ā
0 grants0 milestones0 roadmap items
shadeMint
Created on Nov 17, 2025
ShadeMint is a next-generation color management platform that integrates creative design tools with blockchain technology. It allows users to mint unique color palettes, verify ownership, prevent duplication, and collaborate on visually consistent branding systems. The platform supports real-time palette generation, palette sharing, and on-chain uniqueness guarantees, making ShadeMint a powerful tool for UI/UX designers, developers, and digital artists.
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NoteChain
Created on Nov 16, 2025
NoteChain is a blockchain-powered decentralized application that allows users to create and store text-based notes directly on-chain. Every note is permanently recorded on the blockchain, ensuring transparency, immutability, and public accessibility.
This project demonstrates how everyday utilities like note-taking can be enhanced using decentralized technology, providing an educational example for blockchain developers and enthusiasts.
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NrmChain
Created on Nov 16, 2025
NrmChain is a simple on-chain number guessing game built with Solidity.
It introduces blockchain beginners to smart contract development, randomness generation, and basic game logic ā all deployed on Ethereum-compatible networks.
0 grants0 milestones0 roadmap items
NFT-Minter
Created on Nov 16, 2025
The NFT-Minter Project is an open-source, blockchain-based application designed to simplify the NFT creation process. It allows users to upload their NFT images, generate JSON metadata for the NFT, and interact with a dynamic NFT marketplace. Beginners can contribute to the project while learning how to develop decentralized applications (dApps). By offering easy integration with blockchain technology, the project aims to empower users to engage in the world of NFTs, regardless of technicalā¦
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rise-in-web3
Created on Nov 16, 2025
This project is a simple and transparent attendance tracking system built on the blockchain using Solidity. It allows an administrator to mark attendance for participants and stores each record immutably with a timestamp. Perfect for events, workshops, or academic institutions looking to ensure auditability and trust.
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Fair On-Chain Puzzle
Created on Nov 16, 2025
Fair On-Chain Puzzle is a Solidity-based smart contract that brings a classic memory matching game to the blockchain.
Unlike traditional games where hidden data lives on a central server, this game embraces blockchain transparency ā every move, every shuffle, every card is publicly verifiable.
This project demonstrates one of the most fundamental truths of blockchain development:
š§ Nothing on-chain is truly private.
Even āprivateā variables can be read from storage ā so fairness must beā¦
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celo_pro
Created on Nov 16, 2025
DeckChain is a simple blockchain-based project built using Solidity for beginners learning how to create and interact with smart contracts.
The idea of XYZ is to explore decentralized management of digital ācardsā and ādecks,ā where users can create, shuffle, and draw cards securely on the Ethereum blockchain ā all without relying on centralized servers.
This project demonstrates core blockchain principles:
Ownership of digital assets
Data stored transparently on-chain
Deterministic executionā¦
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Decentralized Note Storing System (XXX)
Created on Nov 16, 2025
š Project Description
The Decentralized Note Storing System is a blockchain-based application that allows users to securely manage small pieces of text data (notes) in a transparent and immutable way.
Each Ethereum or Celo wallet address can store one note, which can be updated anytime by the owner.
This project demonstrates core concepts of blockchain development:
Smart contract functions
Data storage using mappings
Events and user interactions
Transparency and decentralization
MY GITHUBā¦
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HaarJeet
Created on Nov 16, 2025
HaarJeet is a simple, beginner-friendly smart contract game deployed on the Celo Sepolia Testnet.
It allows users to place a bet, choose between 0 or 1 (like heads or tails), and instantly see whether they win or lose ā all handled transparently on the blockchain.
This project is designed for learners who want to understand:
How decentralized betting logic works
How to deploy and interact with smart contracts
How events and payouts function in blockchain games
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SkillMint
Created on Nov 16, 2025
SkillMint is a blockchain-based certification system that issues verified skill NFTs to learners, developers, and professionals.
When someone completes a verified course or program, the admin (contract owner) can mint a Skill NFT containing details such as the skill name, description, recipient address, and issue date.
This ensures authentic, permanent proof of skill verification ā completely on-chain, without relying on centralized servers or certificates.
Github link :ā¦
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BlockGate
Created on Nov 16, 2025
BlockGate is a simple and beginner-friendly Solidity smart contract that records and tracks on-chain job submissions for transparent review.
Itās designed to help developers understand how blockchain can be used to verify, store, and manage digital entries securely.
BlockGate provides a decentralized way to store and retrieve job or task submissions on the blockchain.
Each submission is timestamped, publicly viewable, and permanently recorded ā ensuring transparency and trust in how jobā¦
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My CELO Project
Created on Nov 16, 2025
BlockdareBasic is a lightweight, on-chain challenge logging system built using Solidity. It enables anyone to record a verifiable challenge entryācontaining the challengerās address, a brief description, and a timestampādirectly onto the blockchain. Designed for fairness and transparency, every entry is permanent and publicly accessible, making it ideal for competitions, gaming communities, and audit-friendly environments. With a compact structure and event-based updates, the contract ensuresā¦
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ChainHealth
Created on Nov 16, 2025
ChainHealth is a simple verifiable medical data ledger for individuals.
It allows users to register themselves and store verifiable hashes of medical records on-chain for audit and verification ā without exposing private data.
Built using Solidity (compiled to Solana via Solang), it provides a privacy-preserving, tamper-proof registry for patient health record hashes.
0 grants0 milestones0 roadmap items
Quizchain
Created on Nov 16, 2025
The On-Chain Quiz System is a blockchain-powered quiz application where questions, answers, and user scores are stored on the blockchain to ensure transparency, trust, and tamper-proof results.
This project demonstrates how smart contracts can be used for education, certification, and fair evaluation by removing the possibility of cheating or data manipulation.
Github link :https://github.com/ankit79600/Quizchain
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Proofcert
Created on Nov 16, 2025
ProofCert is a beginner-friendly Solidity smart contract that enables users to store and verify their earned credentials immutably on the blockchain.
Itās designed to make academic and professional certificates permanent, verifiable, and tamper-proof, removing the need for centralized verification systems.
0 grants0 milestones0 roadmap items
Vibecoding2
Created on Nov 16, 2025
ā” Simple Flash Loan Provider (Solidity)
A beginner-friendly Flash Loan Provider smart contract built with Solidity (v0.8.19). This project demonstrates the core mechanics of flash loans ā instant, no-collateral loans that must be repaid within the same blockchain transaction.
š§ Project Description
This project is a simplified educational example of how a flash loan works under the hood. Flash loans are commonly used in DeFi (Decentralized Finance) protocols for arbitrage, liquidation, andā¦
0 grants0 milestones0 roadmap items
wordfi.sol
Created on Nov 16, 2025
WORDFI is a blockchain-based word guessing game built with Solidity. Players try to guess a secret word within a limited number of attempts, and the smart contract automatically verifies the correct word once the game ends.
https://github.com/aryan1gupta-ux/wordfi.sol
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vicky.sol
Created on Nov 16, 2025
Traditional event ticketing systems often suffer from problems like counterfeiting, hidden fees, and centralized control. EventFi solves these issues by providing a trustless, transparent, and tamper-proof platform for managing event tickets.
With EventFi, event organizers can:
Create and manage their events on-chain.
Sell tickets directly to users for a set price.
Withdraw funds safely after ticket sales.
And users can:
Buy tickets securely using cryptocurrency (ETH).
Own verifiable,ā¦
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Biblioblock
Created on Nov 16, 2025
Traditional book lending systems rely on centralized databases that can be edited, deleted, or lost.
Biblioblock solves this by using blockchain technology to create an immutable ledger of book transactions.
Every book addition, lending, and return is permanently recorded on-chain ā forever traceable and verifiable.
github link:- https://github.com/nathanpaul28/Biblioblock
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halloapp.sol
Created on Nov 16, 2025
HalloApp is a beginner-friendly Solidity smart contract that allows users to save Ether, withdraw funds, and view their transaction history ā directly on the blockchain.
Think of it as your decentralized savings account, where youāre your own bank.
0 grants0 milestones0 roadmap items
Library Management System
Created on Nov 16, 2025
The Library Management System (LMS) is a Solidity-based smart contract deployed on the Ethereum blockchain that enables a decentralized and transparent way to manage library operations. The contract allows the librarian, acting as the system owner, to add, update, and remove books from the catalog, while readers can securely borrow and return books. Every actionāsuch as adding a book or borrowing oneāis permanently stored on the blockchain, ensuring full transparency, accountability, and anā¦
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NumSum ā Blockchain Guessing Game
Created on Nov 16, 2025
NumSum is a decentralized blockchain-based guessing game where players bet small amounts of ETH and try to guess the sum of two random numbers. If the guess is correct, the player instantly wins 2Ć their bet through an automated smart-contract payout.
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