I just made an update to SpamFilter.cfc and I am releasing it as 1.0 Beta 2. This is a result of some spam that I have gotten on the contact form of my web site despite having SpamFilter.cfc working against that contact form. I really have to thank those spammers for helping me improve the product.
Find out more about SpamFilter.cfc if you aren't already familiar with it.
The upgrade adds some more regular expressions to check for potential spam. More significantly, however, is that setting the "getNewDefs" argument of the "init" method to true will now cause SpamFilter.cfc to retrieve new regular expression checks as well as new spam words. This should allow SpamFilter.cfc to continue to improve even without downloading new versions of the file.
As the other page mentions, SpamFilter.cfc does require DataMgr (and a datasource), but has no other requirements.
SpamFilter.cfc is open source and free for any use.