123DX (Autodesk 123D)

Autodesk 123DX, which was initially released in 2009 and whose native file format was 123DX, was an easy-to-use Computer Aided Design (CAD) application aimed at home or hobbyist users for creating 3D models.

The 123DX application was retired in 2016, with users moving on to the more advanced Fusion 360 application from Autodesk.