Polls for WhatsApp - Create & share quick polls in your WhatsApp groups
Commandline Challenge - Test your command line skills
Curious Polls - Answer a question once a day for the chance to win £100/$100
Prompt - Prompt provides fully-integrated writing education solutions, combining instruction, curriculum, and feedback. We support educational institutions, companies, and individuals.
Twitter Polls - Polls embedded in tweets
Cwiki - A Command line interface for searching Wikipedia!