Naturally, I want to work on a WebGL based game. This automatically makes it web based with all the attendant benefits and disadvantages.

My first choice is PlayCanvas (free version), which is like a (simplified) on-line Unity. The only alternative that I know of, GooCreate, sadly declared bankruptcy a few months ago.

Pros

• on-line editor (drag ‘n’ drop)
• six years old (so relatively mature and stable)
• support is through forums for free accounts
• FBX support
• collaboration

Cons

• no download for off line storage
• no version control
• limited animation control