SQL Server Compact 3.5 Server Tools installs replication components on the IIS server enabling merge replication and remote data access (RDA) between SQL Server Compact 3.5 database on a Windows Desktop & Mobile devices and database servers running SQL Server 2005 and later versions of SQL Server 2005.
Download SQL Server Compact 3.5
For more information please see the SQL Server Compact 3.5 Books Online
Reference : Pinal Dave (https://blog.sqlauthority.com)