Oh, I'm a sucker for crossovers, and I always seem to come back to Highlander when writing crossovers. Here are a few of my past ones:
ImmortalFandoms: Smallville/Highlander
Characters: Richie, Whitney, gen
Whitney Fordman's life changed the minute he died on the battlefield. Now he has to learn the rules of the Game.
LeavingFandoms: Smallville/Highlander
Pairing: Richie/Chloe, het
Richie has a difficult choice to make.
Old FriendsFandoms: Highlander/X-Men Movieverse
Characters: Richie, Bobby, gen
Richie runs into an old friend at Joe's.
Immortal MagicFandoms: Charmed/Highlander
Pairing: Prue/Duncan
One witch, one Immortal...
The Richie/Paige DrabblesFandoms: Charmed/Highlander
Pairing: Richie/Paige
What happens when an Immortal falls in love with a witch?
Now, let's see what else I can come up with....