chainssh is a shell script to smplify the ssh login via multiple sshgateways/firewallgateaways. e.g. connect from homehost via sshgateway to a clusternode with one command.
VersionT is a project that is designed around a set of shell and AWK scripts to implement CVS. This project also includes the documentation and implementation apart from the software code. Primarily designed for UNIX, is also being ported to Windows.