I've been looking at OnShape recently - coming from a SolidWorks background it's very similar, at the moment there is quite a bit of functionality missing but it's still only in beta. Regarding the 5 active project limit for free accounts this is not nearly as bad as it seems - only private projects are counted and if you have used up the 5 active projects you just need to deactivate one (means you can't open it until you reactivate it) before you can activate another (just click a button to activate/deactivate).
I've tried importing a simple .step made in Moi and it worked fine - at the moment I don't think there is even a loft tool in OnShape (although it is supposed to be coming soon) anyway very interesting stuff.