For full, incremental, compressed and encrypted backups or archives
Robust and flexible VPN network tunnelling
Powerful webdav client and sync tools with client-side AES encryption
Chat Messenger. E-Mail-Client. Websearch. Filetransfer.
cross-platform, encryption application
The source code of the In-Browser-File-Encrypter web app
57 Hash Functions In One Program, plus each with HMAC or KMAC
cross-platform (Java) file encryption and archiving tool
Free portable cross-platform graphical multi-user password manager
antigift is simple cross-platform, files & folders encryption tool
C++ cryptographic library (modern hash functions, ciphers, KDFs)
OpenSC - tools and libraries for smart cards
HOFAT - graphical Hash Of File And Text calculator, 100%-pure Java