Hotline was the greatest single platform for the Macintosh in the 1990s. First Class was great, but Hotline was SO simple, you just pop in a tracker address, fire up the server, point it at 1 folder on your HDD and yer out there, as a pirate BBS server host on the internet hosting those brand new things, MP3's and those wildly hard to gather NES roms, or that illicit copy of Adobe Photoshop 4.5.
Hotline took the AOL script kiddies from #Zelifcam and put them on the real big boy Internet without any restrictions or repercussions. It was glorious time. I still have a Big Red H necklace given to me by the I-forgot-his-name author of the platform.