I've done consulting work for years and I've got code snippets in various languages lying around that I'll re-use for various projects. The collection is getting pretty large and I want to set up a code bank for myself.

What code banks do people use? Do you find it helps, or is there some better way of organising my reusable code snippets?

(If one does exist, I'd prefer it be open-source, accessible via a web browser, language-agnostic, and maybe colour the code the way Stackoverflow does :)