The Smith Project, another alternative CFML server, announced yesterday that they've gone to an open source license.

From their web site:

07-May-2007

Smith goes open-source.

After the very positive feedback from the ColdFusion® Developer Community, youngculture decided to open source its ColdFusion® Server "Smith". Till the end of April Smith Application Server has been downloaded more than 6'000 times.

Developers are welcome to join the project. The project is published under the GPL Licence and will be run and maintained by the newly founded Smith Open Source Software Association (SOSSA).

I haven't tried Smith yet, but it looks promising.