Check out Quilter's Cache and there is a 12" block called Depression (named after the Depression and small pieces of fabric used to make a quilt. I love this pattern, very simple, very easy.

I am a Fat quarter addict. You truly are a fat quarter addict, when you buy 1/4 of a yard of fabric instead of the packs of one or more fat quarters!!!!!!!! Edie

fat quarters
 

Here is a quilt I made with some of my scraps and fat quarters The pattern is called "Scrappy Bargello" and it's on Bonnie Hunters site called Quiltville.

stack and wack using fat quarters - has other names but can't remember

Try a Paper-Piecing Project..I buy fat 1/4s as they are more convenient to use when cutting my pieces..I have a closet full of them and I do eventually get around to using them.

Turning Twenty is done with FQ's and is soooo pretty.

Wickedly Easy....a free pattern download.... https://www.byannie.com/free-patterns/ The pattern truly is wickedly easy. It uses fat quarters with virtually no waste. I did mine in blues, but could be easily turned into a scrappy of many colors.

Fat Quarters are perfect for scrappy quilts. Even if they don't go together, they can look great. When I make scrappys I make certain to have a consistent light background, usually off white but I have seen some excellant white whites. Try the modabakeshop.com to find fat quarter patterns if a scrappy doesn't appeal to you.

Lucky Stars by Atkinson calls for 30 fat quarters - probably just type in Lucky Stars here in the Search box and a bunch of them will show up - HTH

I am the same as you, lot's of fat quarters and no idea what to do with them. I just started using mine last week and am in the process of making this cubed quilt. For each block you need a light, a medium and a dark that you think go together. Here's a picture of my WIP.

Quilt for charity? An I Spy type quilt if you have a big variety. I am thinking of doing a jigsaw puzzle baby quilt with my FQs.