Theres a Gigantic list by now....but nothing that is very Glitchlike.
Biggest population in the games Glitchen Play are:
Nation States
Kingdom of Loathing
Mirimagia
Here Be Monsters(FB)
Puzzle Pirates
Puppet Guradian
Guild Wars 2
Small Worlds
Missing Ink
Freggers
Second Life
Fallen London
Neopets
I don't play a lot of multiplayer games, but most of my favorite titles are 2D games like Glitch in sort of cutesy styles. They'd include World of Goo, Machinarium, Rayman Origins (seriously one of the most underrated games in recent times in terms of everything) and Closure. Superbrothers: Sword & Sworcery EP is wonderful too and share a kind of similar off-center humor with Glitch. OH! And everything Raving Rabbids. Those games are hilarious.
Yeah, the games BenAlex mentioned are pretty great. Sword & Sworcery is incredible, and Rayman Origins is delightful. The world in Rayman is so beautiful, and the characters are just out of control and over the top - I couldn't keep myself from grinning all the way through the demo!
As for MMOs, I haven't tried many on the spreadsheet, but I can recommend Myst Online: Uru Live. A lot more serious than Glitch, but beautiful environments, really cool puzzles, and NO COMBAT. Love it!
For humor, Nation States, Kingdom of Loathing, Missing Ink, for both community, and crafting, Puzzle Pirates, Puppet Guardian, and NORD...past that, its hard to find an MMO that fits really...these are the closest anyones managed to find so far.
Although i can say i still love Transformice, which is a non-violent MMO its a building/problem solving/racing game. The community can be harsh at times, but there are ways to combat that.... www.transformice.com/
I'm really loving Leap Day (www.leapdaygame.com) right now. It's a cute, nonviolent multiplayer online crafting/puzzle game. .... Which doesn't quite adequately describe it. It just went into open beta and I think it's a lot of fun although it probably won't appeal to everybody.
I got Proteus a few days ago and I absolutely LOVE it! Its singleplayer, but I found it to be very Glitch-like. Its a very relaxing game in general (for me), and sometimes really exciting. Others have said they find the whole game exciting. I highly recommend it for anyone who loved exploring.
I just tried LeapDay...the little dudes are very cute but the game is kinda hard?? I think it might help if you have an engineering-type brain...you definitely have to think. I will keep playing this one.
ro.me not really a game, but a hub for creativity, like Glitch was.
Once you get past the short introduction it is an infinite world, and you can help design it. Singleplayer, but very relaxing.
Ghosts of Mistwood I've been playing it since Christmas, and I'm hooked. No fighting, a lot of crafting, quests, exploration, a hidden object minigame, team chat (everyone is broken up by birth sign) and frequent updates.
I just signed up for alpha/beta testing on this very promising game: www.wanderthegame.com/
I contacted them about the alpha/beta testing and they asked me to mention it in this thread, because new forum registrations aren't taken..so they can't do it themselves.
Check Salem : http://www.salemthegame.com/
Get the beta key : http://www.mmorpg.com/giveaways.cfm/offer/388/Salem-Beta-Key-Giveaway.html
It's a 3d survival-sandbox MMO built on Java , the graphic is pretty meh i would say but the gameplay is very deep and wide , makes it an interesting game . It is one hell of a real sandbox game .
*Note : This game is super hardcore because you lose your character if you DIE ( that's why multi-characters and accounts is allowed ) . Criminal acts are parts of the game , sure you can find many nice people there but Crime + perma death can be a pain in the *ss if you are not careful , the game is like the real world , but without any law .
Many of us are now playing Here Be Monsters on facebook. It is an awesome game. I only joined about a week and a half ago but am already addicted. It has many aspects of glitch such as fishing, cooking, exploring, farming, animals but there is also trapping monsters. The quests are very good and keep you very busy. If you haven't already given it a try it is definitely worth looking into. I'm Breezy Meadow on there as well
I've been checking out Leap Day. It's interesting, but requires you to leave it alone for long periods of time which is... not fun.
Although it's blocky, you can check out the World of Ur Minecraft Server. We've created a lot of familiarity within the world and is a blast with a lot of people. Once you've registered, you can check out the screenshots thread and see the things that have been built that you can't see on the map, like the DNA clusters, shrines people have built to their favourite Giants, Bureaucratic Hall and even Winter Walk.