Polygon is the leading platform for Ethereum scaling and infrastructure development. Its growing suite of products offers developers easy access to all major scaling and infrastructure solutions: L2 solutions (ZK Rollups and Optimistic Rollups), sidechains, hybrid solutions, stand-alone and enterprise chains, data availability solutions, and more. Polygon’s scaling solutions have seen widespread adoption with 3000+ applications hosted, 1B+ total transactions processed, ~100M+ unique user addresses, and $5B+ in assets secured.

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ZORA is the marketplace protocol for NFTs. The Zora protocol lets anyone create a permissionless and onchain marketplace for any NFT. Zora has a rich ecosystem of marketplaces, protocols and apps built on it, including PartyDAO, Mirror, Catalog and Artiva. Create your own marketplace in minutes using our open source template.

OpenSea is the first and largest peer-to-peer marketplace for cryptogoods which include collectibles, gaming items, and other virtual goods backed by a blockchain. On OpenSea, anyone can buy or sell these items through a smart contract.

Livepeer is a decentralized live streaming network. It provides the necessary infrastructure for broadcasting video over the internet, at a fraction of the cost to today's cloud infrastructure. The easiest way to get started is through the hosted gateway at livepeer.com, which presents a simple API for developing live streaming applications.

Harmony is an open and fast blockchain. Our mainnet runs Ethereum applications with 2-second transaction finality and 100 times lower fees. Our secure bridges offer cross-chain transfers with Ethereum, Binance and 3 other chains.

Build on Harmony, bridge to all chains. We are an open platform for your assets, collectibles, identity and governance. Come harmony.one/apply!

Superfluid is a new DeFi Primitive that brings streaming money to Ethereum tokens, allowing them to flow seamlessly between wallets 🌊💰 = 🚀

Streaming money is a new paradigm, and you can use Superfluid to supercharge anything, from real-time financial applications to gamified coordination mechanisms. 

📌 Stream-to-vote DAO Governance?

😇 Gamified recurring donations / subscriptions?

🧨 Cash-flow lending / streaming investments?

Superfluid is on a mission to enable sustainable and long-term financial innovation 🌈

Bonus points for every hack that supports this vision!

IPFS is a peer-to-peer network and protocol designed to make the web faster, safer, and more open. IPFS upgrades the web to work peer to peer, addressing data by what it is instead of where it’s located on the network, or who is hosting it.

Filecoin - the world’s largest decentralized network, allows users to store, request, and transfer data via a verifiable marketplace. Filecoin is completely open-source, enabling people from all over the world to participate. The Filecoin protocol runs on an advanced and novel proof system — a combination of Proof of Spacetime (PoSt) and Proof of Replication (PoRep), to provide unmatched efficiency and reliability. Filecoin’s advanced technology provides a robust foundation to store the world’s most valuable data sets. An alternative to costly cloud storage, the Filecoin network offers efficiently priced and geographically decentralized storage, minimizing financial barriers, and allowing users to take advantage of its unmatched network capabilities.

Circle is a global financial technology firm that enables businesses of all sizes to harness the power of digital currencies and public blockchains for payments, commerce and financial applications worldwide.

Circle is also the principal operator of USD Coin (USDC), which has become the fastest growing, regulated and fully reserved dollar digital currency. USDC now stands at more than 42 billion and has supported about $700 billion in transactions over the past year.

Today, Circle's transaction and treasury services are giving rise to a new generation of financial services and commerce applications that hold the promise of raising global economic prosperity through the frictionless exchange of financial value.

Rarible Protocol is an open source, cross-chain and community governed NFT protocol. The protocol is composed of a set of smart contracts and an open source NFT indexer deployed on Ethereum, Tezos and Flow (soon Polygon and Solana). Some of the cool features include: Lazy Minting (gas free minting), a decentralized exchange with a shared order book between all the NFT applications using the protocol, ERC721 or 1155 minting, a royalties standard which is compatible with externally minted NFTs (meaning we can adhere to application fees and royalties like those of KnownOrigin for example). 

These tools allow for a wide number of use cases, including: free minting applications for any type of content that require zero previous crypto knowledge from users, two sided marketplaces, displaying of NFTs using our indexer, listing items for sale in an application and monetizing it via a fee split.

Moralis provides world-class NFT APIs and web3 game-engine integrations. Moralis supports many different chains for fetching NFT data and Moralis Unity integration allows you to easily build Web3 Unity games with login support, asset sync and much more.

NFTPort is the Stripe for NFTs: one-stop, simple NFT Infrastructure and APIs for developers to bring NFT applications to market in hours instead of months. NFTPort takes care of the infrastructure so that developers can focus on building their application. NFTPort provides APIs for multi-chain NFT data and NFT minting, together with out-of-the-box NFT search, recommendations and detecting NFT counterfeits. NFTPort is used by 5000+ devs, including leading projects such as POAP and Nifty Gateway. Built by a team of ex-NATO, Nvidia & Monese and backed by the Co-Founders of Polygon, Skype & Wise.

We at Covalent believe that access to organized blockchain data can unlock a billion possibilities and so we provide the world's best single unified API to bring full transparency and visibility to assets across all blockchain networks. With the Covalent API, there is no need to invest developer resources in writing sub-graphs or SQL queries since granular, decoded, multi-chain data is immediately available for a dozen blockchain networks including Ethereum, BSC, Polygon, Fantom and Avalanche. Covalent is fast becoming the go-to data provider, with the Covalent API powering over 500 industry-leading projects such as Zerion, ChainGuardians, 0x and Reef.

The Covalent Unified API is the fastest way to get blockchain data into your NFTHack project Use it and be immediately eligible for our prize pool!

Unlock is an open source, Ethereum-based protocol designed to streamline membership benefits for online communities. Unlock is meant to help creators find ways to monetize without relying on a middleman. It’s a protocol — and not a centralized platform that controls everything that happens on it.

Unlock’s mission is about taking back subscription and access from the domain of middlemen — from a million tiny silos and a handful of gigantic ones — and transforming it into a fundamental business model for the web.

The Unlock Protocol can be applied to publishing (paywalls), newsletters, software licenses or even the physical world, such as transportation systems. The web revolutionized all of these areas - Unlock will make them economically viable.

The Graph is an indexing protocol for organising and efficiently accessing data from blockchains and storage networks. The Graph has been running a hosted service since January 2019 with over 2,300 subgraphs deployed for Web3 and DeFi applications built on Ethereum and IPFS, like Synthetix, Uniswap, Aave, Balancer, Gnosis, Aragon, and more.

The Ethereum Name Service (ENS) enables you to have a cross-platform web3 username and profile, to simplify crypto payments for any blockchain, and decentralized websites. ENS supports .ETH names natively, as well as importing DNS names you already own. ENS is integrated in over 300 services, including wallets, dapps, and browsers.