rrs is a reverse (connecting) remote shell. Instead of listening, it will connect out to rrs in listen mode. The listener will accept the connection and receive a shell from the remote host. rrs features full pseudo-TTY support, full OpenSSL support (client/server authentication and choice of cipher suites), Twofish encryption, a simple XOR cipher, plain-text sessions, peer-side session snooping, a daemon option, and reconnection features. It is known to compile and run under Linux, FreeBSD, NetBSD, OpenBSD, and QNX.
Novosec Bouncy Castle Extensions provides some extensions to the Bouncy Castle Cryptography framework. It features an OCSP (RFC 2560) server and client that work with the Bouncy Castle OCSP generators and parsers, and a full tested implementation of CMP (RFC 2510, RFC 2511) generator and parser classes, that also rely on Bouncy Castle classes.
Lock Box Labs PGP Tools comprise two command line tools and associated ant tasks for manipulating Open PGP key rings and performing encryption, signing, key generation, and certification operations. The toolkit is fully written in Java and the lbpg-tools jar provided with the distribution and the source code will work with JDK 1.4 or later. The toolkit is built on the Bouncy Castle APIs.