- Summa Technology First product, Riemann, is a "cross-compiler" for Bitcoin-like systems. It allows to create transactions for all of these systems. Also the blog posts are of value.
- https://webbtc.com/script/
- https://github.com/kallewoof/btcdeb
- https://siminchen.github.io/bitcoinIDE/build/editor.html
- Trust-minimized derivatives
- Discreet Log Contracts
- Taproot
- Graftroot
Lightning Network
- Bitcoin Dev Mailing List
- IRC Channels