Name: Opera
Website:
http://www.opera.com
Liscence: $39 (for all your home PCs)
Special Features: Tabbed Browsing, pop-up blocker, skins, intergrated e-mail (if you like gmail's way of sorting mail, Opera M2 is just the same, but came first), download manager, very customisable.
P.S. If you use Opera for a week or two, then you will love it, all it's little extras that make browsing really easy. But im sure that the same applies for Firefox, IE is just well, IE.
pps. another thing i like about opera is that is has way more features than firefox does on its own. And isnt as much of a resource hog.