[Legolas]

Leto's advanced editor does allow you to change heads, hair colour and all that, but you won't be able to see the results until you play the character. If you want to take the time to learn it you can re-engineer at which levels a character gained certain feats and so forth. It's just not user-friendly.
The console takes care of several additional options like setting variables not stored in databases, though it doesn't list the ones of relevance for you the way Gatekeeper etc. do.

Finally there's the gentle art of scripting. A number of multiplayer modules, in particular the persistant worldish ones in Roleplay and Social sections, are equipped with an in-game character modifier using scripting commands to alter appearance and such on the spot. Sadly that rarely includes the colour of hair, skin and tattoos, changing of descriptions (though if the module uses NWNX2 there's a better chance of that) and a few other minor things but it takes care of most of the rest. Unfortunately the better quality works haven't yet made it to the Vault.
On a similar note, a bit of scripting lets you change database variables as well.
Items, of course, must be designed in the toolset and imported into a game - or the character must be temporarily exported instead.

So in answer to the question, there aren't any real character editors out there. Leto's considered to be about the best tool there is, but doesn't do it all. You can change just about everything, but it's a concert of several tools which doesn't satisfy any but those who're long since used to it.