Switch Back
Presenting lots of reasons to switch to Macs. [Flash]
http://www.ubergeek.tv/article.php?pid=55

Pronic Electronics
Manufacturers of rocker switch, push switch, toggle switch, slide switch, and inlet socket. UL, CSA,VDE recognized amongst others. Based in China and Taiwan.
http://www.pronic.com.tw/

McPhling Hack
Allows you to quickly switch back to the last-used app or popup a list of the most recently used apps with a stroke of the pen. Based heavily on Phlegm Hack. Source code available. Freeware.
http://mikemccollister.com/palm/#McPhling

HTML Notepad
for those who design web sites with a notepad. Get a multi-file notepad that checks spelling, inserts common code strings, produces color code, and much more. Free Download.
http://www.superwin.com/htmlpad.htm

Eppol - Switch-off
Switch parody site in Italian (but still worth viewing.)
http://www.phenelope.com/eppol/

Switch Zoo
At Switcheroo Zoo you can make new animals, play games, solve jigsaw puzzles, learn about animals, join a zoo quest, watch movies, and more!
http://www.switcheroozoo.com/

Zhejiang Huanghua Switch Factory
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http://www.huanghua.com/

RFC 1434
Data Link Switching: Switch-to-Switch Protocol. R. Dixon, D. Kushi. March 1993.
http://tools.ietf.org/html/rfc1434

RFC 2174
A MAPOS Version 1 Extension - Switch-Switch Protocol. K. Murakami, M. Maruyama. June 1997.
http://tools.ietf.org/html/rfc2174

Switch
This is a program that lists all open windows and allows the user to switch between them.
http://www.starfighter.acornarcade.com/mysite/utilities.htm#switch