Onshape hands down. Browser based so there's no compatibility issues. It's super easy to use and pretty powerful. Its free for hobbiests (the caveat being your models will be publically accessible). We use it exclusively at work and it's been awesome.
Onshape.com
I'd love a good Foss CAD package but there are too many issues with the current ones for me to make the jump.
I've been using Addy for years and it's been great. I believe I'm on the lite plan and have never (to my knowledge) hit any limits. Definitely recommend.