úmëa ér uilë - Evil still lives?

[Voralphion]

Gundabad was mostly destroyed in the war of dwarves and orcs when they wanted revenge on the orcs for he killing of Thrain by Azog.

It says somewhere that Sauron was the last personified evil in the world, and that any evil after that would be the evil in men.

[Saraphim]

But Morgoth himself the Valar thrust through the Door of Night beyond the walls of the world, into the Timeless Void ; and a gaurd is set forever on those walls, and Earendil keeps watch upon the ramparts of the sky. Yet the lies that Melkor, the mighty and accursed, Morgoth Bauglir, the Power of Terror and of Hate, sowed in the hearts of Elves and Men are a seed that does not die and cannot be destroyed; and ever and anon it sprouts anew, and it will bear dark fuit unto even the latest days.

This is from the end of the Silmarilion.

It means, at least to me, that although Melkor, and later Sauron, was banished from beyond all the circles of the world, what they strove for (the dominion of Hate and Terror over the children of Illuvitar, ect) was, at least in part, successfull.

When has any of us not felt afraid, or hateful? According to Tolkien, the thought that was planted within the first genrations of humanity still holds true today. So, yes, úmëa ér uilë.

[Hookbill the Goomba]

There will always be evil, because of mannish nature, and dwarvish nature to a lesser extent. Even if all of the bad creatures were hunted out and destroyed, man would still be treacherous.

I would agree to an extent, but the way I see it is that Melkor is the utter source of Evil in Middle Earth. Without Melkor I don’t think Evil would have entered. Without the treat of Morgoth All of the children of Iluvatar would not be so fearful of each other to begin with. The Peoples of Middle Earth would be more trusting and so I would say that it is Melkor who planted the Evil into the hearts of Men, Elves, or Dwarves.
The fear of treachery and the fear of foes will have made them untrusting of each other. And so as it says in Silm;

The seeds of Melkor's hate were deeply imbedded in the world.

(Or something likes that. Correct me if I misquoted)

Back to the subject, I think that there would be some Worms left after Smoug. Many have argued that the Fell beasts that the Názgul rode upon were dragons, but personally I think this may be dew to the poison of the film... but that’s not for here... The Dragons were an intelligent race, look at Glaurung, he was both a captain and a grate addition to Melkor's fours. So if any were left that weren’t sitting on a pile of gold somewhere, it is logical that if any servants of Sauron / Melkor would try and get them to fight for them. Wouldn't they?

[burrahobbit]

I think that there would be some Worms left after Smoug.

Smaug was the last of the big ones.

Many have argued that the Fell beasts that the Názgul rode upon were dragons

What else is evil and flies?

[symestreem]

The steeds of the Nazgul had no feathers or scales, but naked hide. Their description differs somewhat from that of a dragon. Also, would Legolas have been able to shoot a dragon? A young one perhaps, which is what the steeds would have had to been because of their size. But if the steeds are dragons, then there are no more, because these creatures are the 'last untimely brood'. Also, if they were dragons then they were winged but fireless. Were there any like that? Did the cold-drakes have wings?
Personally, I think that they are more likely to be one of Morgoth's creatures that he released. RotK says that the beast was perhaps 'a creature of an older world... whose kind, lingering in forgotten mountains cold beneath the Moon, outstayed their day...' Who else was releasing monsters in the First Age?
If they are Morgoth's creatures, are they evil any more than the horses are? Don't you have to have awareness before you can be evil?

[Saraphim]

If the winged steeds of the Nazgul were dragons, cold-drakes, ect, Tolkien would have named them as such. Instead, he used simply adjective-names to describe them, showin that they were unnamed, or had a long-forgotten name.

[Voralphion]

Eowyn killed the fell beast ridden by the Witch-King by cutting off its head. If it were a dragon this would not have been possible as dragons had strong scales that served as armour over their whole body, except their bellies. If it was a dragon, her sword would've just bounced off. I think Tolkien said in one of his letters that the fell beasts were a pterosaur like creature.