Mozilla Firefox

Homepage: https://www.mozilla.org/el/firefox

Download link: https://www.mozilla.org/el/firefox

Operating Systems: Windows, Mac OS X, Linux, Android

Description: Lighter and faster. Supports: tab browsing, anti-phishing,automatic updates. Hundrends of  add-ons here: https://addons.mozilla.org/el/firefox/

Opera

Homepage: http://www.opera.com/

Download link: http://www.opera.com/

Operating Systems: Windows, OS -X, Linux

Description: Very fast and with many features.

Google Chrome

Homepage: http://www.google.com/chrome

Download link: http://www.google.com/chrome

Operating Systems: Windows, OS -X, Linux, Android

Description: Web browser from Googlw . Nice interface and new features. Try it. !!!