SimpleText.ws is a dead-simple online text editor
Keeping notes, todo lists, or just anything you are writing synchronized between computers can be a hassle. Some solutions, like using DropBox, require you to install software on computers that you regularly use. If your needs aren't that heavy, but you'd like a free way to keep your text available wherever you are, check out SimpleText.ws.
SimpleText.ws is an open-source, very light text editing environment that allows you to create and manage documents in a web service, and access them anywhere. It uses Google for authentication, so if you already have a Google account, signing in is as simple as clicking the Sign In link.
The fact that SimpleText.ws is open source means that if you're not comfortable hosting your text on someone else's server, you can grab the server code and host it yourself.
There is also a public API available for SimpleText.ws, which means that developers can write applications that synchronize with it. Currently there is only one, but it's a good one: Hog Bay Software's WriteRoom for iPhone.
How do you keep your text files available no matter what computer you're working on?