Widgets are small web programs built with the same underlying code as normal websites. However, these programs are designed to be self-contained, allowing them to be displayed as (almost) standalone objects on a user's desktop when using a capable platform.
In this case, the platform is the Opera browser, although Firefox, Safari and Chrome can run these demonstrations as well, where possible. Using Opera, you can download any of the widgets here and have them displayed on your desktop for interaction without any browser chrome.
So what are you waiting for? Start using widgets! :)
This fancy widget loads crossword puzzles which use the Across Lite .puz file format. The static version here can't save your progress, but the widget version can. A full featured interface, it includes a Clues tab, Keyboard tab, and several "Cheating" options ;)
My widget masterpiece! PlanetWerks is a three-dimensional widget-sized tour through our solar system. This pretty darn awesome simulation lets you zoom, rotate, scale and click through planets, dwarf planets and major TNO's.
A multi-player online roshambo (rock-paper-scissors) game. Play rock-paper-scissors with random real people from around the world!
Crazy Maze is a clone of a timeless Atari console classic, Maze Craze. This widget is unique because up to three players can play simultaneously using the same keyboard. Includes most of the options of the original, such as Wounds and Invisible Walls.
A Video Poker widget containing five different game variations: Jacks or Better, Bonus Poker, Double Bonus Poker, Double Double Bonus Poker and Deuces Wild. Also includes a training system to help you increase your edge on the real machines. Unlike the games you'll find in the casinos, this version won't cost you anything to play ;)