LogicGuns.com is a new Social Knowledge Network Site built for Engineers. It has features like personal messaging, personal feed, Photo Gallery on top of a huge collection of user submitted Technical Questions. When a user attempts the questions correctly, they gain points and badges.
User has the ability to bookmark questions, comment on questions, tag other users, upvote / downvote questions and add their own solution to questions posted.
Within 20 days of launch it has received more than 5000 registrations and has been able to rank 60,000 on Alexa.
The Technology stack is Django, Postgresql, MongoDB for notification System, Redis for session management, Elastic search for blazing fast search and te fron end is on HTML/CSS and jQuery.