What is 123d?

123D is a suite of computer-aided design (CAD) and 3D printing software applications created by Autodesk. The software includes tools for designing, sculpting, and modeling 3D objects along with features for rendering, printing, and sharing 3D models. 123D was originally released as a free software suite, but Autodesk discontinued it in March 2017. However, the software can still be used and downloaded from third-party websites. The 123D suite includes various tools such as 123D Design, 123D Sculpt+, 123D Catch, 123D Make, and others. These tools allow users to design and create custom 3D objects, ranging from basic shapes to complex structures. 123D also has a large active community of users who share their work and collaborate on various projects.