What system do you want to use? What kind of modern fantasy world do you envision:
Neverwhere; Imagica; Split Infinity; American Gods; Shadowrun; RIFTS?
As for races off the top of my head:
1) On ENWorld, I've posted outlines for playable races based on True Fey sentient plant elves (who could also be fungal instead of plant), Anthropomorphic Snapping Turtles and
Nephilim. The latter would be a more variable & flexible version of D&D's Planetouched.
In addition, even though they probably aren't what you want, I've also discussed classic alien Greys as the inspiration for elves, an aquatic humanoid race with nematocysts and chromatophores, a small, flying version of Thri-Kreen and Warforged that are actually housing the brains of Psionic Dwarves, a la Dr. Who Cybermen or Daleks. I mention them only to help with brainstorming.
2) Someone else on this site did a conversion of the giant-sized Wolfen from Palladium RPG. Not only is it well done (I used it myself), but there are minis that fit the race to a T from the Confrontation minis line...which apparently has gone belly up. If you like the idea, now is the time to find those minis.
3) Yoink races from sci-fI games. The Sesheyans from Alternity/D20 Future make a
FINE FRPG race.