ShearerSite is now hosted by SourceForge.
Version 1.5b16 was released on June 14, 2003.
On the SourceForge download page, you'll see two variants, ShearerSite-for-Windows.zip and ShearerSite-not-for-Windows.tgz.
The program code is the same in both files; the only difference is line endings and a few tiny startup scripts (written as batch files in the Windows variant, and shell scripts and Mac OS X command files in the other). The .zip file is significantly larger, though; go figure.