SpruceSSL is an open source plugin for many webkit based browsers that allows users to force websites to go through the SSL protocol (HTTPS) using a blacklist and a whitelist to protect you against the possibility of your accounts/information getting stolen. With the ability to also force cookies to be secure only (Meaning you can not access it out side of https), you can be sure your accounts/information will not get leaked with the whitelisted sites. Using SpruceSSL can help you protect against sslstrip and FireSheep.
What's new in SpruceSSL
Version 0.1: Release notes were unavailable when this listing was updated.