Client-side javascript blocks all spam bots. XHTML 1.1 compliant.
Cleans up commenters' bad language.
Adds a sidebar widget to display Website uptime using Pingdom, with which you must have an account and api key.
Logs requests from search engines and determines what keywords are being used to find your posts!
Template tag to display a weighted list of category links
Adds rel="nofollow" to comment links, rendering them useless for spammers.