Aurifex Labs have opened up their new web-based tool Abra for preview. Sign-ups are limited to 100 at this time, but there are still plenty left if you get in quick.
Abra is a web tool for building games with Phaser: a popular, mature, and fully featured JavaScript game framework.
Write code, upload graphics and sound, and run your games right from your browser. No installation or setup required.
Real-time collaboration lets your team work together productively and focus on the game. Integrated version control coming soon.