Sting, Orcrist, & Glamdring

[Phrim]

samrohan wrote:

Thorin took Orcrist with him, did anything happen to it after that? Also what happens to the other two after their respectful owners left middle earth?

From The Hobbit:

They buried Thorin deep beneath the Mountain, and Bard laid the Arkenstone upon his breast. "There let it lie till the Mountain falls!" he said. "May it bring good fortune to all his folk that dwell here after!" Upon his tomb the Elvenking then laid Orcrist, the elvish sword that had been taken from Thorin in captivity. It is said in songs that it gleamed ever in the dark if foes approached, and the fortress of the dwarves could not be taken by surprise.

So Orcrist was entombed with Thorin. As for Glamdring, I would suppose that Gandalf took it with him, but I don't think we have any evidence either way.