Greenplan and GreenFlow are fully integrated with each other with no need for exporting and importing data between the two. The programs do not depend on each other and can be used separately.
The programs are developed in Microsoft Visual Studio and they are based on the Microsoft Dot-net framework. This is the newest and most advanced framework for programming.
Data are stored on a Microsoft SQL Server. Any version from 2005 and newer will do. It is possible to download a free express version of the SQL server from Microsoft.com.
Download: Microsoft SQL Server 2012 Express.