SolveSpace is described as 'Parametric 3D CAD program with extrude, revolve, union and difference functions. Save/Export as DXF, PDF, SVG, STL, STEP. Mesh generation expected by most 3d printers. Constraint solver point tracing for motion analysis' and is a CAD software in the photos & graphics category. There are more than 50 alternatives to SolveSpace for a variety of platforms, including Windows, Mac, Linux, Web-based and BSD apps. The best SolveSpace alternative is FreeCAD, which is both free and Open Source. Other great apps like SolveSpace are SketchUp, LibreCAD, Autodesk AutoCAD and OpenSCAD.