I find the only way to manage source code is in the source control repository. This includes templates and pseudo code algorithms.
How it's different from the rest of your code ?
I'm familiar with cvs that can be hosted for example here (setting up cvs server is not to complex task either) you can search the repository using cvsearch and browse it using cvs web client.
I'm not saying cvs is a best option just another one that fulfill all your need.
Code snippets is a not a good option, IMHO.
