SoftElegance has started to use the SplendidCRM in trial mode. At the moment we are using Community edition with MS SQL Sever 2008. After the first month we will consider to use or not SplendidCRM and the version in case it could cover our requirements.
SplendidCRM is a Microsoft-centric open-source customer relationship management application. It was written in C# using the Microsoft .NET Framework 3.5 and Microsoft SQL Server 2008.