I see someone already mentioned Gurk II, its definitely a fun game, with the old school 8-bit style (the first Gurk is also fun, but the sequel definitely added more).
My 2 favorites are:
Andor's Trail - its "in progress" so there are areas you can't get to yet and quests that can't be completed, but what's there so far is still a lot. And there's supposed to be an update coming up (not sure when though). Make sure to also visit the forum, I think it enhances the fun of the game. There is some grinding involved, but its an open map and there's no level limits for the quests, and lots of cool items/skills. It also has a "choose your own adventure" feel for some of the quests (you can't go back on your choice).
Legends Arcana - This one is an "action RPG" with a nice hand drawn style, and its pretty fun. You won't have to grind too much (but probably a little) and once you get enough gold, you can pay (in-game, not with actual money) to redistribute your stats, so there's a lot of replay value. There's also an "Endless" Dungeon with a scoreboard and lots of cool items/skills. And this one also has an open map. There are some quests where you might be suggested to be at a higher level before trying, but nothing as restrictive as Zenonia 2 (the only one of the series I've played).
Both games have forums, and the developers are generally pretty good with replying on there, or my e-mail.