PHP Secure Communications Library is a set of pure
PHP implementations of DES, 3DES, RC4, Rijndael,
AES, RSA (PKCS#1 compliant [v2.1]), SSH-1, SSH-2, and SFTP.
Works so much better than pecl/ssh2.
A tool for securing DNS communications between a client and a DNS resolver.
A polyhedral extraction tool (PET).