Indie-wise:
Animal Collective
The Arctic Monkeys
Belle And Sebastion
Bright Eyes
Clap Your Hands Say Yeah
Death Cab For Cutie
The Decemberists
Fiery Furnaces
Franz Ferdinand
The Futureheads
Jet (technically garage, but Indie and Garage rock are pretty much the same)
Modest Mouse
Of Montreal
The Postal Service
The Smiths
The Strokes (Garage)
Ugly Casanova
The White Stripes (Garage, but I'm sure you're familiar with this band)
Wolf Parade
Yeah Yeah Yeahs (Garage?)

Nujabes is awesome, I don't really care what anyone has to say.

Techno and such, the obvious pick is Daft Punk and another choice would be Scooter, maybe. Also check out Freezepop, though they're more of the synthpop variety.