It is only 500 KB and open source.. pretty fast.
http://www.sunrisebrowser.com/en/
Sunrise is the open-source browser that based on WebKit framework for Mac. It is light and fast. The concept is to add some convenient functions that have not equipped it with other browsers yet. The same rendering engine as Safari is used.
It has graphical bookmarks and a lot more cool features so I thought I post it here.
Oh and for all webmasters the newest Seamonkey version just came out: web-browser, advanced e-mail and newsgroup client, IRC chat client, and HTML editing made simple -- all your Internet needs in one application.
It works on more platforms:
SeaMonkey 1.1.2
* Windows, English (13MB)
* Linux GTK2, English (14MB)
* Mac OS X, English (23MB)