Testing TLS/SSL encryption anywhere on any port
For full, incremental, compressed and encrypted backups or archives
C++ cryptographic library (modern hash functions, ciphers, KDFs)
Bringing intranet on the internet with Zero-Config Mesh VPNS.
52 Hash Functions In One Program, plus each with HMAC or KMAC
Bug-fix-only libev port of shadowsocks
A decent SQL dorker
Distributed reverse / forward proxy and tunneling solution for TCP.