Tactical Breach Wizards, a turn-based strategy game about spec-ops casters with a habit of throwing people out of windows, has a free demo after years in the cauldron
It might just be my history with City of Heroes—an MMO which had witches and wizards aplenty in its modern comic-book styled setting—or my love of Dimension 20's Fantasy High, but I'm a huge fan of modern magic settings. Give me a witch in a leather jacket and I'm basically there.