Tennessee whiskeys/bourbons off the top of my head:
Jack Daniel's
George Dickel
Prichard's
Collier & McKeel
Corsair
Chattanooga Whiskey
Heaven's Door (Bob Dylan's Nashville distillery)
Uncle Nearest
Pennington/Davidson Reserve
Greenbriar/Belle Meade Bourbon
Short Mountain
Tenn South
H Clark
Col. Hunter's (made by Leiper's Fork Distillery)
There are actually a good many Tennessee whiskey makers...they're not as widely distributed as the Kentucky bourbons, but in some ways, that's what makes them great. And they're not as limited by the confines of fitting the "bourbon" requirements, so they branch out and make a wider variety of interesting tastes. Corsair is the prime example of this. Their Triple Smoke, Rasputin, Ryemageddon, etc. are all very different tasting whiskeys, but all delicious in their own right.
Also, the Col. Hunter stuff, while hard to find, is fantastic. And expensive. Prichard's was my favorite whiskey from anywhere, but they hit a distribution snag...now it's hard to find and ridiculously priced if you find it.