There aren’t that many Visio replacements available on the net. I wrote about the alternative Gliffy earlier, but there’s another alternative called Cumulate Draw.

At the moment, you don’t have to register to start drawing, you just press “draw” and it starts. You cannot store files on their servers but you open/save to your local harddrive.

Compared to Gliffy, it doesn’t rely on Flash and allows you to save all your work locally in SVG, JPG, PNG, PDF, and editable formats. It’s not as powerful as Gliffy and doesn’t have as many symbols but it haven’t been around for so long so make sure to check back often!

Oh and by the way, it’s open source! You can download the source and put it on your own servers.