Any CAD alternative options?

[bam-bam]

Hello all-

Before I moved, I had Autodesk Inventor available as a school resource. However, that resource was recently taken away because I had recently moved, and my school does not offer CAD/PLTW as a part of their school curriculum.

I'd like help more on CAD for my team, so are there any alternative resources where I can run CAD?

I have a computer capable of running Inventor, but I share this computer with my sister, consequently running out of memory required for Inventor. Does this mean I need a new computer entirely?