Public Code Repositories?

dubious9 asks: "Today I was refactoring a parser of mine to use a better implementation of a string searching algorithm. I went to the internet trying to find a good code repository where I might have a chance to find an implementation of a good algorithm, but a cursory glance turned out no clear winners. SourceForge was the best that I could find. Where is the best online repository/library of common and reusable code snippets?" We've tackled this subject a once or twice over the years, is SourceForge really the best answer or are there other options?