Have a look at OpenIntents (http://www.openintents.org/en/libraries), it's likely on the order of what you're looking for.
Not a whole lot of listings there, however, and unfortunately, it doesn't seem to get updated very regularly. Not much of a crowd that's sourcing the content, I guess. (That said, I really do appreciate the work that the people involved with OpenIntents have done. Kudos.)
Given the various technologies in Android that support developing frameworks (like being able to create a library project! not to mention services and intents) it's a bit surprising there aren't more resources available for finding useful libraries. Especially little teeny-tiny microframeworks that take away some of that boilerplate we Android devs have to suffer through.
As developers I think it would be nice if we were able to go to the Android Market and search for libraries and frameworks. (Yes, i'm looking at you, Google, Amazon & other app market makers.) Don't care if it's a separate market, so as not to avoid confusing end users who are just looking for apps. I'd just like a better alternative than manually having to do a search across the web and wade through the results until I find (or don't, as usually the case when searching for Android libraries) what I'm looking for.