There is a game-in-game at the Leringard Arms: Demon cards? Don't know the name of it, I've never played but Lance ran a tournament once. It's supposed to be fun and a decent way to earn coin if you're not a grinder.
Possible if there is room you could add specific class quest. For rogues you could do a trap collecting quest. twenty traps to find or make. For clerics and paladins you could have a quest where that have to heal twenty injured people. Of course these individuals would be scatter across the world. For druids and ranger have a quest where they heal or free animals. Again scatter across the world. Wizards you could do twenty rare books to find and read. (possibly just clicking on a book shelf and have a conversation tied to it.). Sorcerer and bards. I'm thinking places of power twenty different spots. Monks, twenty meditation areas for enlightenment. Fighters and barbarians you could possible do twenty bounty hunter missions where they have to track down and fight wanted men. The wanted men could go peacefully with a conversation using intimidate or persuade. if that didn't would then it would lead to a fight.
Mixafix used to employ an ingenious idea to give the community something to do which I myself copied at times.It requires minimum GM time to set-up and zero GM time to run.Quest items would be placed around the world in different locations (caves/dungeons/places of interest/places seldom traveled )These items can be themed and tie in to a quest, or simply the people who find the most items get a small prize and a little xp bump.This to me was a brilliant idea, as it promoted grouping to get through those harder places, gave people alone on the server something to do, and again, required minimum time to set-up and didn't require a GM to be present.