A little bored today so why not compile a list of web browsers?  There are some really good ones like Flock, Shiira, and Maxthan so if you're looking for a new browser here are your choices. There are more, but these are all free. If you were to ask which browser I use I would answer Firefox on desktop and Safari on iPhone. Firefox is my personal favorite. Also, I was curious about older browsers I used in the past so if you want an older browser like Mosaic, yes Mosaic, I found an archive site with all the old browers...

Updated July 2, 2009 to include mobile browsers.

Orca                   Windows
Chrome               Windows   
Chromium            Windows, OS X, Linux (built off Chrome - not ready for non-developer/tester usage.)
Flock                   Windows, OS X, Linux
Safari                  Windows, OS X
Seamonkey         Windows, OS X, Linux
Firefox                Windows, OS X, Linux
Camino                OS X
Opera                  Windows, OS X, Linux
Shiira                   OS X
Wyzo                   Windows, OS X
Maxthon              Windows
Avant                   Windows
Sunrise                OS X
Phaseout             Windows
K-Meleon             Windows
Konqueror           Linux (Geared towards KDE)
Epiphany              Linux (Geared towards Gnome)
Galeon                 Linux (Geared towards Gnome)
Amaya                  Windows, OS X, Linux
Chimera                Linux
Lynx                     Windows, OS X, Linux (Console text only browser)
Slimbrowser         Windows
KidRocket             Windows (Designed for children)
ShenzBrowser     Windows
Internet Explorer    Windows 

Note: Linux also implies Unix. Some browsers, like IE 7 and Safari work in Linux using Wine. Check Wine-Doors as they may appear for easy install.
Visit the browser archive where you can still download Mosaic!

Mobile Smartphone Browsers 

Firefox
Internet Explorer
Opera Mini
Opera mobile
Mozilla Minimo
Skyfire
Bolt
JB5