Other Tracking Client APIs can be found on the Tracking Server Resource Center
The Tracking Client API for .Net Compact Framework is based on Microsoft .Net Compact Framework 3.5 and works alongside with ArcGIS Mobile.
To download the Tracking Client SDK for .Net Compact Framework, which includes the API Library, documentation, and samples, simply (1) login and (2) download the Tracking Client SDK for .Net Compact Framework.