Handel is a development tool (like Delphi) made byDelphi! You can Create Project, Compile, and Run Project using Handel. Also Handel support Form Design Environmemt like Delphi. Handel is compatiable with Delphi. Handel can open or write units, projects, form made by Delphi (version 2,3), and Delphi can open units, projects, form made by Handel. However not perfectly compatiable with Delphi.