Phunt - Product Hunt command line interface
Commandline Challenge - Test your command line skills
Haxor News - A Hacker News command line interface
Prompt - Prompt provides fully-integrated writing education solutions, combining instruction, curriculum, and feedback. We support educational institutions, companies, and individuals.
Audacity - Audacity is a free and open-source audio production software suite that includes a surprising array of editing tools and recording systems.
Cwiki - A Command line interface for searching Wikipedia!