Alright, this here is the ultimate llist of MMOs known to LYN. Unless stated, they are your standard garden variety MMORPG. Also next to each one is a description describing the most important detail about any MMO out there... Wether there are charges involved.

Here's a quick guide for what means what in the list.
Activation - The price to start the game. This includes anything from the price of a starter pack, retail pack, activation keys, etc.
Monthly fees - Monthly charges that are required for the user to play. Can be done via credit card or point card system.

The purpose of this list is so that anyone who wants to know what's free and what's not can easily check so here. So, any future threads requesting just that will be shut down promptly. This thread can also be used to ask general questions about online games (If you want specifics, go to the game threads... that's what they're there for)

This is the first draft of the list, it will be updated regularly and I'll get around to sorting it properly.

So, here's the list in no particular order (Okay, its basically the list of threads in the forum and I"m just ripping em off). You can post any corrections or other games here as well:

Activation and monthly fees required
A3 Online LYN thread
Ragnarok Online LYN thread
Final Fantasy XI LYN thread
City of Villains LYN thread
Planetside LYN thread
Dark & Light LYN thread
Star Wars Galaxies LYN thread
Everquest 2 LYN thread
World of Warcraft LYN forum
Dungeons & Dragon Online LYN thread
Lineage 2 LYN thread
Final Fantasy XI LYN thread
Free to play with Cash Shops
Maple Story SEA LYN thread
KAL Online LYN thread
thread
Ran Online LYN thread
GoPets LYN thread
Shui Hui Fantasy Online LYN thread
Knight Online LYN thread
Pangya SEA LYN thread
EVE-online LYN thread
Kong Kong Online LYN thread
Trickster Online LYN thread
JX2 LYN thread
Special Force Singapore LYN Thread

Free newbie play. Fees required for further levelling
Rakion Online LYN thread
Survival Project LYN thread

Activation fee required, no monthly fees
Guild Wars LYN thread

Monthly fee required, no activation fee
EVE Online LYN thread

Open Beta (Free)
GunZ The Duel (Online FPS/TPS) LYN thread
Warrock (Online FPS) LYN thread
Turf Battles LYN thread
Dispatch of Army (Online FPS) LYN thread

Web-based (Free)
Utopia LYN thread
Neopets LYN thread
Archmage LYN thread
OGame LYN thread
GamesTotal (Galactic Conquest) (Certain races require fees to be unlocked) LYN thread
Legend of the Green Dragon
Pardus
Archspace

Totally free
Silkroad Online LYN thread
Gate to Heaven - LYN thread
Fly for Fun LYN thread
D.O. Online LYN thread
Race War Kingdom LYN thread
MU Online LYN thread

Unknown
Uncharted Waters Online LYN thread

This list will be updated on a regular basis. Now, if you'll excuse me let me go bang my head on the wall for a bit as I wear off the effect of reading all the badly written websites I just went through...