(There's no video for LetterRip Pro 3 yet. Please contribute to MR and add a video now!)
LetterRip Pro server version 3.0.7 containing both the server app and the administration app.
LetterRip_Pro_3.0.7.sit (2.12 MiB / 2.22 MB)
LetterRip Pro v3.0.7 installer / compressed w/ Stuffit
Architecture: 68K + PPC (both versions can be installed)
At least 2.4MB of free RAM
Mac OS 7.x - Mac OS 9.2.2
Emulating this? It should run fine under: SheepShaver