Any truly Free2Play MMOs out there?

TRULLY F2P:
RIFT (there is almost nothing you can buy in shop that you can't get in game for free)

Aion NA version.

If Neverwinter is on your list, then Star Trek Online and Champions Online (the other two Cryptic MMOs) should be there too, since they are all using the same business model.

Spiral Knights?

Eden Eternal.
Pirates of The Burning Sea.

DC Universe Online?

Just wonder - does anyone still play Runes of Magic? I used to play it after 3rd patch. It was quite fun buy only until you got 40th lvl. After that it became one big Pay2Win machine. Even shitloads of grind weren't a solution, because without upgraded equipment you had no chance to survive in high level locations.

World of Tanks, no questions asked.

How about you just stop being so picky :P I play a lot of F2P games that are super greedy. That doesn't mean they are automatically less fun.

Spiral Knights is FTP, it's a bad game but yeah.

World of Tanks is a GREAT FTP game; you can spend money on it for boosts but theres nothing that you can pay them for that you cant get on your own except tanks that you cant upgrade and are garbage compared to other normal tanks.

Spiral Knights is a truly F2P, I play it a lot and I didn't spend anything to reach where I am now. I have friends that made all missions and didn't spend anything

Some older games such as Zu Online and Maplestory could be fun to play, although Maplestory has gone to hell. There's a classic Maplestory server, 'Nightsoulms', and when I say classic... I mean as in the first year or two of Maplestory. I think they have added some of the later-on stuff in, and it's decently active. I haven't gotten onto the server yet, so you'd have to figure it all out yourself. Zu Online was a decent but generic grind-fest MMO back when I played it a few years ago. From what I remember, its cash shop was just cosmetics, and you can buy a few mounts, although once again, cosmetics because you can get a free mount( and IIRC you capture and train mounts or something ) very early on. Both games are fun with actual friends to play with, though. Otherwise, it's kind of boring.

Lunia Z is completely free...

Could Vindictus also fit into your list? It has no premium account types as far as I know, a cosmetic shop, and a supply depot shop that has stuff like pets and random packages for armor/weapon sets that you could probably get through in game playing, with the exception of a few items.