Stacks is a Bitcoin L2, bringing smart contract functionality to Bitcoin, without modifying Bitcoin itself. Stacks takes a pyramid approach, where you have the foundational settlement layer at the bottom (Bitcoin), and then a layer on top of that to add smart contracts and programmability (Stacks), and then layers on top of that for scalability and speed (Hiro's Subnets).

UniSat Wallet is a browser extension wallet that makes it safe and easy for users to store, send, and receive bitcoins and Ordinals on the Bitcoin blockchain.

Bitlight Labs develops infrastructure based on the RGB protocol and deploy multiple applications on LightningNetwork, with a primary focus on implementing the trading infrastructure for RGB20 tokens.

Merlin Chain is a Bitcoin Layer 2 powered by Bitmap, building upon the native assets, protocols, and products on Bitcoin Layer 1, to Make Bitcoin Fun Again.

BiHelix is a Bitcoin ecological infrastructure based on the Bitcoin native blockchain, combining the RGB protocol and the Lightning Network to build optimized nodes. It aims to make it easier for developers to use, increase the use cases of Bitcoin, and solve the challenges of scalability and Turing incompleteness faced by the Bitcoin blockchain. Create a fairer decentralized encryption world for miners, validators, node service providers, exchanges, and users.

Solv is a Decentralized Bitcoin Staking Protocol to unlock the full potential of Bitcoin assets through a liquidity consensus infrastructure. By addressing the fragmentation of BTC assets, yield opportunities, and custody solutions, Solv offers Bitcoin holders a gateway to BTCFi, continuously builds pathways and confidence for traditional funds to enter the crypto world.

Bitroot is a Layer 2 scaling solution for Bitcoin as the programmable asset issuance protocol enables issuance of fungible Tokens and NFTs on the Bitcoin Chain and with the implementation of OP_CAT and BitrootVM it enhances the capabilities of smart contracts, making possible that users and developers can create and manage their own digital assets on Bitcoin's infrastructure keeping the high decentralization and security, enabling broader asset representation, expansion and operability.

bitSmiley is a Bitcoin-native Defi project that has innovated in both application design and protocol layers. Its groundbreaking Fintegra framework comprises three main components: a decentralized overcollateralized stablecoin protocol, a native trustless lending protocol, and the on-chain derivatives protocol. bitSmiley will initially introduce bitUSD, a native overcollateralized stablecoin on the Bitcoin blockchain, addressing the lack of stable price-pegging tools. Users can generate bitUSD by overcollateralizing their BTC, allowing participation in all BTC blockchain DeFi protocols. Each bitUSD is backed by overcollateralized BTC, ensuring stability and user asset security through a robust liquidation and repayment system.

Lorenzo Protocol is an on-chain asset management platform that tokenizes and integrates CeFi financial products into DeFi, aiming to connect on-chain capital with a wide range of off-chain financial strategies. With tradable tickers, users can easily engage in complex yield strategies. As yield infrastructure, Lorenzo powers financial access products such as Neobanks, Payment Finance, Wallets, PayFi, RWAFi, DeFAI, and more, enabling the large-scale integration of sustainable on-chain real yields.

Saturn is a non-custodial peer-to-peer orderbook that bringing fungibility and a new token layer to Bitcoin.

BadgerDAO is focused on building the products and infrastructure needed to accelerate the growth of Bitcoin in Decentralized Finance (DeFi) across multiple blockchains. Badger's first product, Sett Vaults, enables users to earn yield on their synthetic BTC assets. Digg, Badger's second product, is software that manages the DIGG token, a cryptocurrency with an elastic supply pegged to the dollar price of Bitcoin.

TerpLayer is a decentralized BTC liquidity protocol that connects Bitcoin's vast liquidity to Berachain's cutting-edge DeFi ecosystem. By enabling native Bitcoin trading and harnessing Berachain's Proof-of-Liquidity (PoL) consensus, TerpLayer opens up unprecedented DeFi opportunities for Bitcoin holders. The protocol features Terplayer Atomic Swaps (TAS) for secure cross-chain transactions and a Berachain-based AMM oracle for optimal price discovery and liquidity provision. TerpLayer's $TERP token incentivizes participation, fueling the growth and user engagement in this innovative Bitcoin-Berachain integration.

Alpen is a scaling Bitcoin with Zero Knowledge technology solution. The platform build infrastructure to enable the broader, adoption of Bitcoin. Ushering a new era of trustless, verifiable computation.

Luminex is a Bitcoin Ordinals launchpad platform, that allow users to participate fairly in the Bitcoin ecosystem.Luminex has proposed the BRC-69 standard, designed to simplify the creation of Recursive Ordinals collections, reducing inscription costs and streamlining the on-chain pre-reveal process.

Blockstream is a leading blockchain development company founded in 2014. Its core focus is on developing new infrastructure for the legacy financial system, with key developments revolving around Bitcoin sidechains and other blockchain-related applications. Their flagship technologies include their own implementation of the Lighting protocol and the Elements Project, an open-source sidechain blockchain platform. Blockstream has launched a number of products, such as Liquid, an inter-exchange settlement network based on Bitcoin, Blockstream Green, a secure bitcoin wallet, as well as other products that provide real-time and historical cryptocurrency trade data, and colocation services for bitcoin mining operations.

Sats Terminal is a Bitcoin-native aggregation protocol, offering seamless access to aggregated swaps and liquidity across multiple Bitcoin DEXes and DeFi platforms.

Mirror L2 is a decentralized Proof of Stake (POS) BTC L2 compatible with EVM and smart contract while utilizing BTC as GAS. POS nodes utilize mBTC, the mirrored version of BTC on the L2, as collateral proof for the L2.

Dark City is an MMORPG on Bitcoin. User can grow skills, scale wares & rule the underground. Dark City powered by Bitmap, Ordinals & TAP.

Start9 is a privacy solution based on the Bitcoin network that aim to natural human right and must be enforced by technology. Start9 design simple personal servers that run self-hosted, open source applications.

The goal of AIPTP is to build a decentralized blockchain-based AI network. AIPTP decided to build a dual L2 network for Bitcoin. Where: Bitcoin L2 (tentatively AIS) with POS mechanism supports AIPTP's training model; Bitcoin L2 (tentatively AIW) with PoW mechanism supports AIPTP's inference model. $Bitcoin & $ATMT can cross-chain circulation between the three chains, where $ATMT adopts the burn+mint cross-chain circulation method, and $Bitcoin adopts the pledge A chain and release it in B chain for cross-chain swap.

Omega strives to create decentralized infrastructure that will redefine omnichain & Bitcoin DeFi. Omega unlocks the ability for users to leverage cross-chain digital assets to enhance their yield through modular DeFi opportunities in a decentralized & secure manner.

OpenStamp is a marketplace for BTC Stamps(SRC20, STAMPS, SRC721). The platform also offer minting services.

Interlay is building its flagship product, "InterBTC," a fully collateralized one-to-one Bitcoin-backed asset that enables interoperability between multiple blockchain ecosystems while preserving Bitcoin's censorship-resistant nature. Interlay v2 proposes introducing native DeFi functionality to the network: a decentralized AMM-based exchange (Uniswap v2 model and Curve Stableswap) paired with a liquidity protocol for BTC borrowing and lending (Compound v2 model). By creating markets catering to Bitcoin holders and building deep liquidity in these protocols, Interlay will enable easy, one-click access to Bitcoin-centered DeFi use cases, ranging from simple passive liquidity provision to tailored long/short leverage positions.

Ola is an Earning-Enhancing Network incentivized by the Bitcoin ecosystem. With two core products, Onis and Massive, Ola creates a comprehensive ecosystem where users can become BitVM challengers, ZK bridge supervisors, ZK verifier nodes, DA samplers, and a variety of monitoring roles to empower the Bitcoin ecosystem.

BNSx is a Bitcoin Name Service System that offer Identity Verification SDKs and Secondary Domain Service. The BNSX project aims to revolutionize decentralized identity solutions on Bitcoin's Layer 2 networks.

Wavlake aims to help artists around the world unlock more value from their work by integrating bitcoin payment metadata with openly available audio content (a system commonly referred to as Value4Value).

Bitflow is a decentralized exchange that aims to solve fractured liquidity across the Bitcoin ecosystem, offering a user-friendly platform for trading BTC, Stablecoins, Stacks tokens, BRC20s, and more. With strategic wallet partnerships, including Hiro (Leather), Xverse, and Asigna, and by leveraging technologies like PSBTs, Atomic Swaps, AMMs, and Layer-2 solutions such as Stacks, Bitflow provides efficient decentralized swaps and sustainable BTC yields.

BTC Domain is a bitcoin domain name service platform where users can register a name and associate it with their bitcoin address. BTC Domain provides an experience similar to the Ethereum Name Service (ENS) by providing a wide range of name-related services, including name registration, name resolution, and other related services.".btc" domains are inscribed as formatted JSON text onto the Bitcoin mainnet, with each domain being a unique inscription that is akin to a BTC NFT.

Bisq is a decentralized network for exchanging bitcoins. It is a safe, private, and decentralized way to exchange bitcoins for national currencies and other digital assets.

Sovryn is a decentralized trading and lending platform developed on RSK, which is based on Bitcoin.