Koders is a search engine optimized for code; it only indexes code files so that developers can directly find source code without having to go through non-code documents and information. It uses proprietary user heuristics to provide higher rank to popular code files. Basically if a file is reused more, it will appear higher in your search results.
Koders provides various ways to restrict or expand search results by using special operators on your search terms. Over 30,000 developers each day rely on Koders to search over 2 billion lines of code written in over 30 languages and identified with 28 software licenses.
Koders also offers plugins for Eclipse and Visual Studio which allow software developers to perform searches directly from within their development environments.