- GooSig reference code https://github.com/kwantam/GooSig- Handshake's GooSig implementation https://github.com/handshake-org/goosig/- Systemization of Knowledge: Computer-Aided Cryptography https://eprint.iacr.org/2019/1393An overview of current efforts at provable cryptographic software.- Fiat Crypto https://github.com/mit-plv/fiat-cryptoWork out of Adam Chlipala's group at MIT on generating certifiedimplementations of crypto software. Now used in BoringSSL!- miTLS https://mitls.org/A certified implementation of TLS. There's also been plenty of worksince then by (some of) the authors on proving security of the TLS 1.3protocol, e.g., https://www.microsoft.com/en-us/research/publication/implementing-proving-tls-1-3-record-layer/- HACL* https://github.com/project-everest/hacl-starA formally verified cryptographic library, used in Mozilla's libNSS.