Dashkards.com is a free resource for cheat sheets you can add to Mac OS X Dashboard for quick and easy reference. They're perfect for looking up keyboard shortcuts, Terminal commands, multitouch gestures and more.
Dashkards.com is maintained by Thomas Borowski, a Mac geek with a passion for creating stuff. Tom works from his home office in Bavaria, Germany. He is also the owner of Keyboard Kahuna, an online store for printed cheat sheets for Mac apps.
You can follow Tom on Twitter, read his blog or send him an email.