For just whatever I'm doing/working on (if already started while on server). Normally I'll be running my redstone/cmd block world for friend to join to check up on projects he's following progress on. Server is ran on a windows 7 machine with 1G ram and through my ServerStarter batch file. World(s) are not backed up so any anonymous players will be limited to Spectator mode or in a TP jail so they can't explore.
[above was me trying to fill the character requirements, some stuff is likely to change.]

McVersion:
1.11 - 16w44a
IP-address:
74.196.209.93