Ergonis Software (http://www.ergonis.com) has released KeyCue 4.5, an
update of the keyboard shortcut "cheat sheet." The upgrade adds two
high-contrast large-font themes to make KeyCue even more helpful for
visually impaired users. With this version and version 4.0 of
QuicKeys, the two applications work together allowing KeyCue to show
the currently active QuicKeys shortcuts.

KeyCue detects and displays an instant overview of all shortcuts.
Version 4.0 goes a step further by making the items in the KeyCue
window clickable. This makes shortcuts instantly executable by
clicking them while browsing the KeyCue window.

KeyCue 4.5 requires Mac OS X 10.4 or Mac OS X 10.5. It's Universal
Binary so runs natively on both PowerPC and Intel Macs. The upgrade
to KeyCue 4.5 is free for anyone who has purchased KeyCue in the last
two years. For new users the cost is US$29 for a single user license.
.
Instead of purchasing KeyCue by itself, customers can get the
Macility Productivity Bundle that also contains two of the company's
other productivity tools, PopChar X and Typinator. The pricing of the
Productivity Bundle is $64.

QuickKeys costs $99.95 and is available from Startly Technologies
(http://www.startly.com/products/quickeys/mac/4/).