MynahSA is a cross-platform toolkit for connecting C++ objects to data streams. Developers using MynahSA can quickly and easily create client/server applications or encrypted files containing serialized object data. The toolkit uses OpenSSL for encryption and secure network communications. MynahSA is tested on Linux, Microsoft Windows, Apple's Mac OS X, and Sun's Solaris.
mnkPasswordKeeper is a simple password manager. The goal of this project is to permit the saving of passwords/notes on a USB key and be able to use the software on many platforms. It uses the Qt framework for GUI and XML reading. It uses Camellia from NTT as cipher. It has been run successfully on MS Windows, GNU/Linux, and Mac OS X.
pks-commands.php3 allows your Web server to search and add PGP/GPG keys from the public keys out there. It takes the TCP 11371 port connection and does it all on the web server. It is good in environments where the client machines are unable to get to arbitrary TCP ports (such as behind tightened firewalls).