UFONet - Denial of Service Toolkit
antigift is simple cross-platform, files & folders encryption tool
C++ cryptographic library (modern hash functions, ciphers, KDFs)
SLS Team Java Library
Open Source PKI solutions
FIDO strong authentication, encryption, digital signature engine
PKI & Card Management System to issue and manage tokens & certificates
Encrypting, anonymous, unlimited size message transfer system
EasySSL is a library that can establish an SSL/TLS connection
mod_gnutls apache module
this simple program implements the Vigenere cipher in python
Kerberized Messaging Toolkit for Java
partitioning backup recovery and all kind of boot loaders