(There's no video for MacPAR Deluxe yet. Please contribute to MR and add a video now!)
From the built-in Help
MacPAR deLuxe is a utility program that can be useful to you if you upload and download binary files to and from Internet newsgroups.
It's main functions are:
MacPARdeLuxe-dmg.sit (1.24 MiB / 1.3 MB)
0 / 2018-07-10 / 91694736fcec7c7db4dd558847e23279a22a3fd9
From Mac OS 10.1
Emulating this? It should run fine under: QEMU