Would be more accurate to say Gainax, really, since Kill La Kill is the first full length series Trigger have actually done since splitting from them. XD And, well... FLCL and Gurren Lagann and PSG and all...

...Also Gunbuster/Diebuster which everyone should watch because I am a raving 'buster fangirl but that's beside the point so uh yeah. >.> <.<