Smuxi is an irssi-inspired, flexible, user-friendly and cross-platform IRC client for sophisticated users, targeting the GNOME desktop.

Pretzel is a system that builds prettyprinters; that is programs that will take some plain ASCII source code and generate a LaTeXified version for presentation.

prolix launches a command and captures its standard output and error, suppressing uninteresting lines according to a pattern. Yet unlike grep -v, prolix is an interactive program: When you find that the output you're being shown is still too verbose, simply hit enter and add additional suppression patterns. Suppression patterns can be full or substring line matches as well as regular expressions. You can also apply substitutions to lines, for example shorten overly chatty fields.

FSHL is a free, open source, universal, fast syntax highlighter written in PHP. A very fast parser performs syntax highlighting for few languages and produces a HTML output.