Michael Tsai has released SpamSieve 2.6.6, an update to his popular Bayesian spam filtering utility for email clients such as Apple Mail, Mailsmith, Entourage, PowerMail, Mozilla Thunderbird, and Eudora. The new version offers: various accuracy improvements; corrects Mac OS X 10.5 bugs; and much, much more. [ Price: US$30 ~ Requires: Mac OS X 10.3 or later ~ Demo available ]