For full, incremental, compressed and encrypted backups or archives
Powerful webdav client and sync tools with client-side AES encryption
Chat Messenger. E-Mail-Client. Websearch. Filetransfer.
57 Hash Functions In One Program, plus each with HMAC or KMAC
Robust and flexible VPN network tunnelling
The source code of the In-Browser-File-Encrypter web app
antigift is simple cross-platform, files & folders encryption tool
C++ cryptographic library (modern hash functions, ciphers, KDFs)
Multi hash crack suite
Secure mail + Tor gateway
RSA 4096 C++ library