FreeCAD A free CAD modelling editor which can assist in creating drawings and objects in both the 2D and 3D space with drawing tools.
LEGO Digital Designer Official app for creating 3D models with LEGO blocks for design of complex models and art with access to the most popular and obscure blocks made by the Danish company.
Mini CAD Viewer Viewing and zooming in of DWG, DWF and SXF CAD files.