I would like a general purpose code snippets library, that I could use to store bits of code for any language, organized in folders. When any developer on the network adds a snippet, it should get transferred to others.
How can I do this simply? Any app that could be used for sharing libraries of text should be okay too.
That's called "a wiki".
We use a Sharepoint Wiki page for exactly this purpose ... that way code instructions and examples can be included in the same place.
Ron
A wiki is definitely the way to go but why stop there? Why not go with an issue tracking system that adds wiki functionality?
I have first hand experience with Trac and Redmine and openly recommend both of them. We've recently switched from Trac to Redmine where I work and I think I like it a little more than Trac, and use the wiki functionality almost everyday.
Update:
If you are looking for something smaller scale, there was a previous discussion here on SO that looks like it has some interesting links.