...is a largely incomplete emulator of the Sega Dreamcast that runs on PCs.
It doesn't play games but it does run a homebrew demo or two.
Swirly has been much improved recently due to the efforts of Michael Schnerr and James Tranovich. Hooray for them!
To get the latest version of Swirly, go to the SourceForge project page. There you can find out how to pull the CVS tree. Keep in mind that Swirly is meant for developers and is coded in our spare time.
Questions? Send me an email.