Mad Skills Motocross is an addictive, fast-paced, and entertaining side-scrolling motocross racing game. 40 tracks spread across five levels provide tons of play time, and a track editor and time challenge mode make the fun last even longer.
Using an AppleScript, create a Service (in 10.6) that will let you toggle the visibility of the sidebar in all open Finder windows. This also works in 10.5, but it's not quite as useful there, as the script can't fully hide the sidebar.
Learn how to include the Tab key in user-created keyboard shortcuts in Snow Leopard -- something that wasn't possible in previous OS X releases.
Learn a simple keyboard shortcut to release minimized windows into the active Space, instead of back into their original Space.
In Snow Leopard, text replacement must be enabled on a program by program basis. Use this hint to enable text replacements globally, at least in all programs that support them.
Learn about some key changes to the Unix 'top' command in Snow Leopard
Learn how to set the quality level of a remote Mac's screen in the Screen Sharing application in 10.5 and 10.6.
Learn how to add over 20 additional effects to photos taken in Photo Booth and iChat
Four hints for the price of one ... learn how to easily switch between open windows of an app across Spaces, how to delete Mail messages without showing a preview of the next, and two tips for working with links in messages in 10.6's Mail app.
Parallels Desktop 5 for Mac is shipping, including Aero support in Vista and Windows 7, a new Crystal mode for full Windows/Mac OS integration, OpenGL 2.1 acceleration in Windows and Linux, and more.
Learn how to show a still image for some time in your iMovie project, then zoom/crop/move that image, and then pause on the final image again before moving on.
Learn a timesaving (but potentially dangerous) method of deleting files stored on networked volumes without going through the Finder's "are you sure?" warning dialog.
Learn how to see a rotating set of icon previews for files within folders in Quick Look mode - perhaps not terribly useful, but visually intriguing
Learn how to change the Expose All Windows sort order, and how to control whether or not Expose searches across Spaces in Application Windows mode.
ScreenFlow 2 adds transitions, audio ducking, clip playback speed adjustment, and more to the screen recording and editing suite.