Homemade bath rugs using old towels... great idea! Have also seen this with t-shirt scraps
How to Make a Colorful Pompom Rug..would be great to use up those yarn scraps!
If done in cottons, and all in moss colors, this could actually be pretty cute. Pompom Rug | DIY Stuff
Rug making... not crochet, but another great use for rags
Hirondelle Illustration: 100% recycled
Great hand mock up for individual measurements for knitting
Crochet - patterns and inspiration