You can choose the tail color, the layer where it's drawn, the update frequency in updates per second, the segment counts and wether the tail automatically goes away. This application is freeware and comes with included source as an example what can be done using Realbasic, if you have the Monkeybread Software Realbasic Plugin installed.
PriceUSD0
LicenseFree
File Size984.12 kB
Version2.0
Operating System Mac OS X 10.3.9 Mac OS X 10.3 Macintosh Mac OS X 10.4 PPC Mac OS X 10.2
System Requirements<li>Mac OS X 10.2 or higher</li>