Sourcegraph - Sourcegraph is a free, self-hosted code search and intelligence server that helps developers find, review, understand, and debug code. Use it with any Git code host for teams from 1 to 10,000+.
AlternativeTo - AlternativeTo lets you find apps and software for Windows, Mac, Linux, iPhone, iPad, Android, Android Tablets, Web Apps, Online, Windows Tablets and more by recommending alternatives to apps you already know.
OpenGrok - OpenGrok is a fast and usable source code search and cross reference engine.
SimilarSites - Easily find more sites like those you like.
GrepCode - GrepCode.com is a code search engine built by developers for developers to search and browse open...
Product Hunt - A website that lets users share and discover new products