Typomagia! is a typing game in which you quickly enter words on your keyboard to build up magic power, which can then be used to conjure creatures to battle enemies.

While not exactly unique, it's presented nicely and even has a Story Mode, as well as the option to choose the types of words so you can practice specific sets. It's also (dare I say it) quite tactical in the way that your built up magic can be used to create a variety of monsters and even power-up the monsters already conjured - you could see it as a kind of typing/tower defense style mashup.

Grab Typomagia! from the Sol Games site.