LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.
Frank - Frank is a lending and borrowing platform for friends and family.
FreeCAD - An open-source parametric 3D modeler
MagicPlan - The floor plan creation app magicplan lets you create dimensioned floor plans without actively measuring or drawing. With its Augmented Reality.
gCAD3D - 3D - CADCAM - Software for MS-Windows and Linux. Freeware
MASTERSPEC - Made by the American Institue of Architects, Avitru has released a new product that promises a lot of innovations.