TouchLeagueSharp
This API (wrapper really) access the TouchLeauge.com competition API. You can use the API to create social turn based games for mobile platforms (or full games if you would like).
The following API calls are implemented:
BrowseMyGamesBrowseLadderChallengeNonUserGetTurnStateGetUserProfileRemoveRequestRequestMatchSetTurnState
This Project Requires Json.Net which can be downloaded here: http://www.codeplex.com/Json
You will need the following in your .config file:
API keys can be requested by contacting TouchLeague.com: http://www.touchleague.com