LeoCAD is fully free & open-source crossplatformed standalone software that could run on older PC too. Now availiable for Linux/Mac/iOS/Windows; port for Android also in plans:
Mecabricks is cloud-based online, so it require Internet connection and, I think, modern PC with WebGL support. License is EULA-like(?) and its track user (users are kids). Not good for security reasons, and not availiable in offline.
Stud.io is only for Mac/Windows, and its licensed as EULA-like(?). Not good for Linux users.
Here is comparsion of LeoCAD with some other LEGO CAD's (November 2015)
Stud.io and LDD both run well under Wine. However it's good to have an alternative tool that is open source. Stud.io uses the LDraw part database, the same as LeoCAD.
There's also blueprint, a tool to design LEGO instructions. It's not open source due to the author's legal concerns about publishing an open source library to read LEGO's own part database. It's a pity because it is a great tool, with a very good UI. LDraw files (.ldr) support instructions, but the user interface is a bit harder to use compared to the more specialized one in blueprint.
https://github.com/leozide/leocad/issues/65
Mecabricks is cloud-based online, so it require Internet connection and, I think, modern PC with WebGL support. License is EULA-like(?) and its track user (users are kids). Not good for security reasons, and not availiable in offline.
Stud.io is only for Mac/Windows, and its licensed as EULA-like(?). Not good for Linux users.
Here is comparsion of LeoCAD with some other LEGO CAD's (November 2015)
http://jasonmcreynolds.com/?p=507
Think, need create comparsion on Wikipedia
https://en.wikipedia.org/wiki/Comparison_of_LEGO_CAD_softwar...