While it was initially made exclusively for the 24-inch iMac, the Hello screensaver is now widely available -- you just have to find it.

Roku City is a colorful screensaver featured on Roku devices It's had its resolution increased to HD Another free Roku upgrade Roku City, the animated screensaver featured on Roku devices, is ...

Images: Web surfers dream up electric 'sheep' Electric Sheep project combines distributed computing, open-source software with psychedelic magic to produce flock of colorful screensavers.

It's an homage to the four-color CGA era, containing more than 1000 DOS games and over 1200 CGA screens.