I have ported the Spotter, QRZ? And Freckles gadgets I wrote for Microsoft’s Vista Sidebar to Apple’s OS X Dasboard widgets. You can learn more about these widgets and download them at:http://www.kr1st.com/widgets.html
Installation instructions are included on that page. The widgets will run on versions of OS X 10.4.3 and higher.
I hope they will be of some use for the Mac users in the Amateur Radio community.