A free program for Android, by Onshape.
Onshape is a CAD system designed for professional users and extended teams. Create, edit, collaborate, and comment in real-time with others from any computer or mobile device with an internet connection (free sign-up required).
The goal of Onshape is to give users the power to design and build complex structures with ease, while giving engineers the ability to focus on their work. With Onshape, users can design their parts with parametric modeling tools in a 3D environment.
Onshape also gives engineers the ability to view and edit their designs in real-time, which allows them to collaborate with their colleagues on the same project. They can also easily share their designs with their teams and the public.
