For full, incremental, compressed and encrypted backups or archives
cross-platform, encryption application
C++ cryptographic library (modern hash functions, ciphers, KDFs)
Powerful webdav client and sync tools with client-side AES encryption
cross-platform (Java) file encryption and archiving tool
Java application for encryption
antigift is simple cross-platform, files & folders encryption tool
52 Hash Functions In One Program, plus each with HMAC or KMAC
Easy to use PKI library
Sampling exactly from the normal and exponential distributions
Cryptographically secure random password/passphrase generator
Utility to generate and verify checksums/hashes
CMP [RFC4210] implementation based on OpenSSL