Open House Archive
Welcome to the Open House Archive - your central repository for accessing all previous Open House buildathons and projects.
Welcome to the Open House Archive - your central repository for accessing all previous Open House buildathons and projects.
Most Hackathon Won
Most Project Built
Manobendra Mandal
Vivek Sahu
simp1e
Akan
Skia Variants
Hafiidh Luqmanul Hakim
We are three horsemen to build a Traceable Agriculture Supply Through Real World Asset Tokenization.
The DEX that pays you back when it hurts. Self-sustaining Impermanent Loss Shield. Provide liquidity and get compensated for price divergence. Automatically.
Modular yield aggregation protocol that combines ERC-4626 with the Diamond proxy pattern (EIP-2535), giving every yield strategy its own independently upgradeable facet behind a single curated vault.
Reveal Protocol is a receipt layer for crypto commerce.
A payment automation platform that allows users to pay subscriptions, utility bills, and recurring salaries with cryptocurrency through smart contract-powered automation and virtual payment cards.
The Lending Network for Real World Assets
The Skill Economy Built for the AI Era. AI Agent Skills as sovereign NFTs. Traded by humans and autonomous agents alike. Every Skill earns — every holder profits.
The agent-native stack decision layer for crypto builders. Composewith gives agents a source for a building stack that is current, structured, cited, and verifiable.
Rama builds Mycelium Trails — post-execution accountability infrastructure for autonomous agents. Each agent action generates a tamper-evident receipt anchored on Arbitrum. Live at argentum.rgiskard.xyz. Built for the agentic economy.
We are entering a world where artificial intelligence will touch nearly every part of life — how we work, learn, build, create, heal, and solve problems. That future is already being built. The question is who builds it, who owns it, and who benefits from it. Right now, the answers are troubling. AI development is fragmented and centralized. Access is expensive. Ownership is unclear. Trust is nearly impossible to verify. Creators struggle to protect what they build and earn from it. Businesses struggle to find reliable AI tools without assembling entire engineering teams. And communities are left consuming AI rather than owning, shaping, or benefiting from it. Joy Marketplace exists to change that. We're building the economic infrastructure for the agentic era — a decentralized Web3 marketplace where AI models, agents, datasets, workflows, tools, and digital assets can be protected, published, discovered, licensed, and monetized. A place where creators turn their intelligence into income. Where businesses find trusted AI solutions without the overhead. Where communities participate in the AI economy instead of being bypassed by it. The vision is simple, but the scale is massive. Joy Marketplace is becoming the Shopify + Hugging Face of Agentic Commerce — built not to trap creators or centralize control, but to return ownership to the people who earned it. Trust isn't a feature we bolted on. It's built into the infrastructure: blockchain-backed proof of ownership, smart contract licensing, decentralized identity, on-chain reputation, and AI-powered discovery — all running on Arbitrum with Stylus powering the contract layer. Intelligence should not be locked behind closed doors. Opportunity should not belong only to the largest corporations. The people creating the future should have a real stake in it. Welcome to Joy
Predict. Compete. Survive. A gamified prediction market where players stake ETH, predict BTC price movements, and compete in elimination rounds until one winner takes the pot.
On-chain trade credit insurance for SME. No minimum portfolio. No data exposure. Instant underwriting via FHE. Built on ReineiraOS × Fhenix × Arbitrum.