Stackshare - StackShare is a comprehensive website that gives its users the chance to organize and share their technology stack with the rest of the community.
Techmap.io - Techmap is a workplace search engine to find companies using technologies (e.g., Rails, PHP, Java, etc.) that are used internally. Finally, a "Google for Workplaces" that helps people find a place to work with technologies they love!
Siftery - Share products your company uses and get personalized recommendations
Listshare Group Lists - Easily share group lists with your family and friends
xZeitgeist - The most popular tweets categorized and ranked, every day
Checkly - Fresh API monitoring and Site Transaction Monitoring. From one great dashboard.