some material i read in gmatclub.com that people had used

OG 10/11
Manhattan SC
Powerscore Critical Reasoning Bible
Kaplan 800
LSAT Problems
Princeton CAT
Spidey's notes
Manhattan SC
GMAT Club Timer
OG12 - a must
MGMAT books and CATs
GMATClub math tests
GMAT Sets
GMAT Paper tests
Knewton course
LSAT logical reasoning
CAT (Indian MBA entrance test) material
GMAT prep (new version)
PowerScore CR bible
Manhattan CR guide
GMAT Club tests
MGMATs (Manhattan GMAT)