Twitter Polls - Polls embedded in tweets
OpenGrok - OpenGrok is a fast and usable source code search and cross reference engine.
Astral - A social network for augmented reality 📍
GrepCode - GrepCode.com is a code search engine built by developers for developers to search and browse open...
Octotree - Github on steroids
Krugle - Krugle is the complete enterprise solution for search targeted to the development organization.