Do you know what each of them does? You ought to!
My favourite is Podzinger who license some smart voice technology to deliver their offering.
UPDATE: Many thanks to Jason Moon for his recommendation of this link: web2logo
. At the site they've got a nice tag cloud to help you contextually navigate the logos according to the theme of the business behind the logo, simple yet smart :-).
"Balthaser Online says getting the patent means that it can license nearly any rich-media Internet application across a broad range of devices and networks.
It means that anyone who wants to use Flash, Flex, Java, Ajax, and XAML could face a licensing fee from Balthaser when their site goes up."