This is open source, but it is free for accredited students and self-learners. Commercial use of the prototyping tools is prohibited in this Lite version (upgrade to Pro later this year).
We know the struggle. You have the big ideas, but your budget (and your laptop’s storage) says "not so fast." You need professional tools to prototype, design, and execute, but you don’t need the bloatware or the enterprise price tag. student innovation suite lite 1.0. Download EXCLUSIVE
Great for concept modeling and basic FEA. This is open source, but it is free