Is there a user comments snippet that uses CAPTCHA (i.e., doesn't need login)?

A client I was wanting to work with wanted to move from a CuteNews system to MODx (as well as the entire site in time).

However, they don’t like the idea of needing a login if at all possible (no need for users). I didn’t see a CAPTCHA ability for UserComments. Anyone know if there’s a MODx snippet for comments that uses it?

http://modxcms.com/forums/index.php?topic=4767.0

EDIT: ^ Would this work?

Try Jot.
http://modxcms.com/Jot-998.html

Indeed you can use Jot this way with &captcha set to yes and &canpost set to blank (anonymous)
Check http://wiki.modxcms.com/index.php/Jot