Some time ago I wrote a tool called Snippet Manager which manages all those little bits of code that I find myself needing repeatedly, such as the Dispose pattern. (Of course, you can drag snippets to the toolbox in VS.NET, but I wanted something that would also work with Notepad or ASP.NET Web Matrix).

Now Andi Fleischmann has taken this several stages further by adding support for multiple tabs and tooltips. You can find his extended version at this Code Project page. Very cool, Andi!