Koders is a new search engine that enables developers to easily search and browse source code in thousands of projects hosted at hundreds of open source repositories.

The Koders search engine has options for searching source code in the following languages: ASP, C, C#, C++, Delphi, Fortran, Java, JavaScript, Perl, PHP, Python, Ruby, SQL, Tcl, VB & VB.NET and provides a mechanism to search for code released under a variety of open source licenses.

I’ve written a couple of Firefox search plug-ins for Koders, for Perl, PHP and SQL searches.