Self-promo: I've written a few crossover Leverage fics that other people seem to like; they're all on AO3 under Raine_Wynd. :-)

Other people's fic:
Notes on Nate's Fridge
http://archiveofourown.org/works/213756/chapters/320677

A Casual, Easy Thing by Rachael Sabotini (one of my fave writers in any fandom):
http://archiveofourown.org/works/51100

The Anniversary Job by Maab_Connor
http://archiveofourown.org/works/225899

Let me know if you want more, but that should get you started. :-)