Some of the old software before 2010 may not be able to install/run normally on x64 or Windows 10 systems. Be aware of it before purchasing it.
The SMS 2003 SDK Version 3.1 contains the latest release of the Managed SMS Site Server Interfaces. This is a set of managed interfaces for connecting and configuring an SMS Site Server through any .NET-enabled language or application. The managed SMS site server interfaces are built on the .NET Management namespace and greatly simplify the code you need to write.
The SMS SDK also includes samples, extensive reference documentation, and task-based How To topics for the managed SMS Site Server Interfaces.