Have you never used Visual Studio or Eclipse? They easily let you navigate and search your own code, plus any other libraries you might be using and that you have the source code to.
Nullege lets you search through code, while Google Code lets you search for projects. Pretty big distinction there, but I'll leave it up to you to decide which you find more useful. Either way they serve two completely different purposes.
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[ 4.1 ms ] story [ 38.9 ms ] threadI'd also like to see such an engine integrated with posts on the web about code snippets.
Nulledge may well be better for Python, but Google Code Search nominally has the same purpose.