Guild Wars 2 now has a free base game with some limited restrictions.
Account type restrictions can be viewed here
Free accounts starts with less bag slots/character slots than paid accounts.
No map wide chat for free accounts.
Whispers every 30 seconds.
You can access the trading post but can't mail stuff to other players.
WvW restricted to L60 on free accounts.
GW2 is a pretty good game, I haven't really played it since release because of the lack of content (end-game) and WvWvW being a clusterfk.
Fantastic game, with the expansion coming out soon it's actually pretty worth it for new players to purchase the game now as you effectively get the base game for free. $50 USD for expansion + core game.