Allmusic defines Garage Rock as:
Garage Rock Revival as
For original garage rock they list bands like Paul Revere and the Raiders, Shadows of Knight and the Kingsmen (whose version of "Louie Louie" is a garage rock standard).
As for garage rock revival bands they cite bands like the Cynics and the Milkshakes though I think what most people think of is the bunch of garage rock/punk bands that emerged in the late 90's/early 2000's such as the aforementioned Vines, Strokes, White Stripes and so on who developed a simple, powerful rock and roll sound with a do-it-yourself punk attitude.
You could check out some best of's from the original garage rock bands and maybe the compilation 19th Nervous Shakedown - Three Milkshakes or Get Our Way - The Cynics (1994) for the revivalists.
As for newer bands some album recommendations:
Elephant and White Blood Cells - The White Stripes,
Highly Evolved - The Vines
Get Born - Jet
Tyrannosaurus Hives and Veni Vidi Vicious - The Hives
Rubber Factory - The Black Keys
Pawn Shoppe Heart - The Von Blondies