Quote Originally Posted by Cosi View Post
I think Fiddler has one in Malazan.

The Nuban has one in Prince of Thorns, and IIRC it gets used to take out the big bad of the first book.

In Empire in Black and Gold crossbows are an important part of the setting (again, IIRC -- it might be air rifles).

Various MTG card art has people wearing crossbows, whatever that's worth to you.
They become a staple of combat in Wheel of Time over the course of the series. They're particularly useful against Trollocs who are poorly armored large melee combatants, they can cut down dozens when they start developing the crank mechanisms to launch barrages of bolts at a time.

Though none of the main characters are really known for using them themselves, I suppose. That's more of a matter of them not really needing to by the time they became ubiquitous.

Discworld uses crossbows as straight stand-ins for guns as well. Fairly common among guard and assassin characters.