 | Bitcoin Core development-
https://bitcoin.org/en/development Bitcoin Core projects, communities, documentation, etc |
 | Bitcoin Design-
https://bitcoin.design/ Open-source design for Bitcoin products. |
 | Bitcoin Dev Kit-
https://bitcoindevkit.org/ A collection of tools and libraries |
 | Bitcoin Donation Portal-
https://bitcoindevlist.com/ Support bitcoin developers so they can focus on building our future. |
 | Bitcoin Grants Tracker-
https://polylunar.com/bitcoin-grants-tracker/ by @Polylunar |
 | Bitcoin Launches-
https://bitcoinlaunches.com/ What are builders up to? |
 | Bitcoin TLDR-
https://tldr.bitcoinsearch.xyz/ Summarized posts from the bitcoin-dev and lightning-dev mailing lists. |
 | BitcoinDev-
https://bitcoindev.org/ Bitcoin & Lightning Development Resources |
 | Bitpaint-
https://www.youtube.com/channel/UC4DT4qudqogkmbqVAQy8eFg/videos Development visualised over time though Github activity |
 | GitHub.com-
https://github.com/bitcoin Bitcoin source code |
All links provided in good faith.
Don’t trust, verify.