Qikipedia - Instant Wikipedia summary cards on any web page
nodo - Manage your daily tasks in the command line
Newsit - Find the discussion around the page you're looking at!
Prompt - Prompt provides fully-integrated writing education solutions, combining instruction, curriculum, and feedback. We support educational institutions, companies, and individuals.
Anycomplete - The magic of Google Autocomplete while you're typing
Commandline Challenge - Test your command line skills