The local fabric store (starts with a J) has the most options.
The second store (starts with a W) has all the supplies needed and offers an excellent selection but not as much.
Online is a good source for bulk items like zippers, buttons, snaps, etc.
Remnants: are end cuts
Fat quarters are sold everywhere and come in 18x21 inch cuts of fabric.
1/2 yard cuts of fabric: Will make 100's of projects