The Browser Guru

Firefox

From Mozilla Corp. The current main version is 3.5, with older versions of 3.0 ans 2.0 still in circulation.

It is available on a number of platforms including Windows, Mac OSX, Linux etc.

Most recent Version: 3.6.1

Older Versions: 3.5.8, 3.0.18, 2.0.20

Upcoming Release Schedule: https://wiki.mozilla.org/Releases

Internet Explorer

From Microsoft and bundled with it’s Windows operating System. The current version is 8.0

It is only available on Windows.

Safari

From Apple. Current version is 4.0

It is available on Mac and also on Windows.

Chrome

From Google. The current version is 3.0, with a 4.0 beta available.

It is available for Windows, with a beta also available for Mac OSX

Opera

Current version is 10.1

Flock

This is described as the Social browser. It is based on Firefox.

Most recent Version: 2.5.6