It's time to update the list started by H@H@.
The presenting format will largely remain the same as original. Since I'm not the original thread owner, I'll try to re-upload this post once a new page is created for the thread, until forum moderator(s) allows new thread to be created to replace this thread.

For now, I'll only include some of those MMOs with active LYN community posting since 1st May 2014. Additional list of MMOs will be added at forumers request with valid link to the respective LYN thread. (Best to have at least some community support, not a one-man-army thread)

Quick definition:
F2P - Free to Play (Pays nothing to access, usually adopt microtransactions buisness model)
P2P - Pay to Play (Pays activation/monthly fees to access)
T2P - Time to Play (Pays using in-game currency to access, which you earn through spending your time in the game, usually involves monthly fees)

F2P
Microtransactions available
Aura Kingdom LYN thread
Avatar Star Online LYN thread
Blade and Soul (CN) LYN thread
DC Universe online LYN thread
Dragon Nest (SEA) LYN thread
DUST514 LYN thread
Elsword LYN thread
Granado Espada Online LYN thread
Knight Online LYN thread
Lord of The Rings Online LYN thread
Maple Story (SEA) LYN thread
Marvel Heroes LYN thread
Mission Against Terror LYN thread
Neverwinter Online LYN thread
Phantasy Star Online 2 (SEA) LYN thread
Planetside 2 LYN thread
Ragnarok Online LYN thread
RIFT LYN thread
Runescape LYN thread
Tera (EU) LYN thread
TS Online (Philippines) LYN thread
Vindictus LYN thread
Wakfu LYN thread
War Thunder LYN thread
World of Tanks LYN thread

Open Beta
Kingdom Under Fire II LYN thread
P2P
Initial purchase and monthly fees required
The Elder Scrolls Online LYN thread
Final Fantasy XI LYN thread
P2P + T2P
Initial purchase and monthly fees required
Wildstar Online LYN thread (T2P option: C.R.E.D.D.)

Monthly fees required
EVE Online LYN thread (T2P option: PLEX)
In Development
Cabal Online 2 LYN thread
Maple Story 2 LYN thread
Tree of Savior LYN thread

*For an almost full list of MMOs (but without link to LYN community forum), you can refer to:
MMORPG.com

Please check the validity of the provided links and information for those who are much more familiar with the listed MMOs.