Nowadays I started to use a new online versioning service provider: Projectlocker. It seems to be a good one, I hope it will be reliable. I’m using the free version, which gives 5 users and 0.5 GB of storage, but if I need more space or more contributors, it can be upgraded to 30 users and 30 GB storage. ┬áIt provides SVN and Trac. Try it! If you know better service, please post a comment!