Hope this is the right place to ask.. If not, please let us know.
Countly is an open source, enterprise mobile analytics platform tracking more than 600M unique IDs, serving 5000+ apps in 110+ countries. There are several editions of Countly, from Community to Cloud to Enterprise for different requirements.
There are 10s of SDKs for Countly, however noone has ever written a Xamarin SDK yet and we have been asked several times when to expect a Xamarin SDK. We would like to work with a partner (++individual developers are more than welcome) to build such an (open source, MIT licensed) SDK so everyone here can benefit.
Please let us know (via hello at count.ly) if you are interested. We'd be happy to answer your questions if any, in this thread.
-- Countly Team