One of my friends recommended me this simple utility. I like it and I think that the most impressive feature of it is that you can synchronize your documents between your computers. It can be also used for sharing some things with the public or with some other Dropbox users.
The figure
The idea is a basic one. You register at Dropbox.com and download a service application for your operating system (Windows, Linux, Mac and some mobile devices are supported) and select a newly created directory on your local computer.
Everything stored on the Dropbox server will be synchronized down to your computer's selected folder and when you change or add anything to that folder then it will be uploaded automatically and downloaded by your other computers. You can also access your files via the web interface.
You will get 2 GB of space for free and - of course - you can buy more up to 100 GB.
Dropbox vs Google Docs
It is better than Google Docs because you can share ANY KIND OF DOCUMENT that your computer can handle, not only a subset of them. However Google Docs has some advantages like simultaneous editing of texts and spreadsheets.
Dropbox vs revision control systems
It is not for that at all. There are a limited support for undeleting but that's all.
