5 public bookmarks
http://www.columbia.edu/~fdc/postal/#usa
http://www.columbia.edu/~fdc/postal/#europe
https://mykolab.com/
fee-based, supposedly secure and private mail & calendar service based in Switzerland
http://mailexpire.com/
What it says on the tin
http://junkmatcher.sourceforge.net/Home/
improved spam filtering for Mail.app
mymarks