HGL is a compiler/interpreter suite for developing images. It features its own simple but powerful language, Lua integration, output in various formats as well as runtime input handled by plugins, and easy integration into various environments like Web servers or graphical applications. The input is taken from a source file, which has to be compiled for quick and frequent access by the interpreter. An interpreter then runs the compiled files, takes input from custom plugins (if neccessary), and outputs its result via custom plugins.
Jaro Mail is an integrated suite of interoperable tools for GNU/Linux and Apple/OS X to manage email communication in a private way, without relying on online services (in fact, encouraging users to store email locally). It mainly features a system for mailinglist filtering, address-book integrated whitelisting, strong encryption and anonymous remailing, long-term email storage and archiving with functions for fast search and usage statistics. To accomplish all that, it makes use of solid Unix tools like Mutt, Fetchmail, Mairix, Msmtp, GnuPG, Abook, ELinks, and Mixmaster.
Rho is a small, very powerful console-based POSIX text editor and mini-IDE with Bash/Emacs key bindings. A configuration file allows the user to create macros using not only any internal function but anything available to a shell command. Keyboard macros (Ctl-Alt-A through Z) can be sourced into the editor for each kind of task, the next sourcing overwriting the last. Rho also allows an unlimited number of templates (sh, awk, python, etc.) to be injected into executable buffers which trap stdout and stderr.