The most recent version of Savitar is 1.5.3
Release date 12-September-2010
Savitar 1.5 runs on Intel Macs and PowerMac (PPC) G3s, G4s, and G5s running Mac OS X 10.4.11 (Tiger) or later. Release notes are here.
Savitar 1.4 runs on PowerPC Macs running OS X 10.0.4 (Cheetah), 10.1.5 (Puma), 10.2.8 (Jaguar), 10.4.11 (Tiger), and 10.3.9 (Panther). Though Savitar 1.4.3 will run on Mac OS X 10.4.11 and later Intel Macs, we recommend you move up to Savitar 1.5. Release notes are here.
Savitar 1.3 runs on PowerPC Macs running Mac OS OS 8.6 and Mac OS 9. Release notes are here. It downloads as a .sit archive file. Use StuffIt Expander to open it.
You'll need to ensure CarbonLib version 1.6 or later is installed. You can download CarbonLib from Apple's web site here.
And for the venerable and prehistoric Macintoshes... we still support you too!
If you are running on a 68K processor Macintosh using Mac OS 8.6 or 9, use Savitar 1.1. Release notes are here. It downloads as a .sit archive file. Use StuffIt Expander to open it.