Huntathon - Browse and submit Product Hunt Global Hackathon projects
Splitwise - Splitwise is a free tool for friends and roommates to track bills and other shared expenses, so that everyone gets paid back. On the web, iPhone, and Android!
Confs.tech - Open source list of tech conferences: JS / Ruby / Data etc.
Dinngo - Splitting payments the fun and easy way
Ship That Shit - Join 3 no BS events to help you ship that shit
/Tab - The simple way to split a bill among friends.