Those with long-standing birthday events in BusyMac's BusyCal will appreciate version 1.1.2, which now calculates birthdays before 1940 correctly when running in 32-bit mode. That's obscure, as is changing the Decade date range in List View to 2001-2010, but more welcome are fixes for crashing bugs that could bite when resizing events in the Week view, if an edit and conflict occurred at the same time, and if a calendar didn't have a name. Also improved is BusyCal's handling of deleted Google calendar feeds. ($40 new, free update, 6 MB)
Option-Click AirPort Menu for Network Details
If you hold down the Option key while clicking the AirPort menu in Mac OS X 10.5 Leopard, you'll see not just the names of nearby Wi-Fi networks, but additional details about the selected network. Details include the MAC address of the network, the channel used by the base station, the signal strength (a negative number; the closer to zero it is, the stronger the signal), and the transmit rate in megabits per second showing actual network throughput. If you hover the cursor over the name of a network to which you're not connected, a little yellow pop-up shows the signal strength and type of encryption.
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Special thanks to Cebulla Tommy, Andrew Burrows, Ray Thompson, and Jed
Althouse for their generous support!