Translations:Licence/16/en

You can use FreeCAD as a base for your own application, and are not forced to make your application open source. The LGPL license, however, ask for two basic things: 1) that you clearly inform your users that your application is using FreeCAD and that FreeCAD is LGPL-licensed, and 2) that you clearly separate your own application from the FreeCAD components. That is usually done by either dynamically linking to the FreeCAD components, so users are allowed to change it, or making the FreeCAD source code, along with the modifications you brought to it, available to your users. You will get support from the FreeCAD developers as long as it is not a 'one way street'.