The Perl Shell (psh) combines aspects of bash and other shells with the power of Perl scripting. It aspires to be your primary login shell.
Sudoscript is a pair of Perl scripts (sudoscriptd/sudoshell) that provide an audited shell using sudo.
confiserie is a project similar to
autoconf/automake. The goal of the project is to
create a build configuration system that is faster
and easier to use and extend.
YaSH (Yet Another SHell) is a small, secure, portable shell with integrated scripts & simple programs (an IRC client, CD writer, etc.).
A stock market application.
An IRC bot able to run multiple bots in the same process and more.