LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.
Frank - Frank is a lending and borrowing platform for friends and family.
NttCAD - Free 2D/3D CAD software, easy to use and multi-platform
MagicPlan - The floor plan creation app magicplan lets you create dimensioned floor plans without actively measuring or drawing. With its Augmented Reality.
QCAD - QCAD is an application for computer aided drafting in 2D.
MASTERSPEC - Made by the American Institue of Architects, Avitru has released a new product that promises a lot of innovations.