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APIs, block explorers, node software, and open-source Bitcoin developer tools.
27 listings, grouped Bitcoin first by label. Inside each group: open source first, then the rest, then listings marked Not recommended, each A to Z here (the interactive directory rotates them weekly). Nothing is hidden. This version needs no JavaScript.
Bitcoin used directly as money, or tools for running, securing and building on it.
ACINQ ₿ USE
Eclair Lightning implementation and Phoenix wallet.
Bitcoin Core ₿ TOOL
The reference Bitcoin node implementation.
Bitcoin Dev Kit ₿ TOOL
Rust library for building Bitcoin wallets.
Blockstream Explorer ₿ TOOL
Privacy-respecting Bitcoin blockchain explorer.
Cashu ₿ TOOL
Chaumian ecash for Bitcoin Lightning.
Core Lightning ₿ TOOL
Lightweight Lightning implementation by Blockstream.
Fedimint ₿ TOOL
Federated Bitcoin custody for communities.
Jam ₿ USE
JoinMarket GUI for Bitcoin CoinJoin privacy.
LDK ₿ TOOL
Lightning Development Kit by Spiral.
LND ₿ TOOL
Lightning Network Daemon by Lightning Labs.
Mempool.space ₿ TOOL
Bitcoin explorer and fee market visualizer.
myNode ₿ TOOL
One-click Bitcoin and Lightning full node.
Polar ₿ TOOL
One-click local Lightning Network test environment.
RaspiBlitz ₿ TOOL
DIY Bitcoin and Lightning node on Raspberry Pi.
Ride The Lightning ₿ TOOL
Web UI for managing your Lightning node.
Umbrel ₿ TOOL
One-click Bitcoin and Lightning node.
VLS ₿ TOOL
Validating Lightning Signer for key security.
About bitcoin: learn, track or get professional help. No bitcoin moves through them.
Bitcoin Design Guide INFO
Design reference for Bitcoin applications.
Chaincode Labs INFO
Bitcoin Core development and education.
MiniBolt INFO
Step-by-step Bitcoin and Lightning node guide.
Q&A for Bitcoin developers and users.
Bitcoiner.Guide SERVICE
Hands-on Bitcoin mentorship and tool guides.
BitDevs INFO
Local Bitcoin developer meetups worldwide.
Separate networks or token systems built around bitcoin.
Bitlayer PROTOCOL
Zero-knowledge Bitcoin Layer 2.
Group-held. Bitlayer’s docs say that for BTC bridged to Bitlayer PoS (V1) the team works with multiple MPC custody platforms, including Coinbase and Sinohope; its BitVM bridge is marked as work in progress. Bitlayer docs: Bridges
Nostr PROTOCOL
Decentralized social protocol aligned with Bitcoin.
RGB Protocol PROTOCOL
Smart contracts on Bitcoin and Lightning.
Stacks PROTOCOL
Smart contracts that settle on Bitcoin.
Group-held. Stacks’ docs say the peg wallet behind sBTC, its bitcoin-backed token, is initially maintained by a set of 15 community-chosen signers. Stacks docs: sBTC