Fabric covered buttons. How about making a covered button for each fabric in your stash then displaying them? You could use the buttons to select fabrics for a project (and use the buttons to finish the project).
Beautiful embroidered covered buttons. Here's a thrifty, crafty trick & tip: If you're not good at embroidery then there's a 'cheats' way to get this result. Visit your local Charity Shop (Thrift store for our USA folks) and seek out old embroidered table cloths and handkerchiefs which already have embroidery on them. Cut out the sections of embroidery (making sure you don't snip the important threads) and use these sections to make your buttons!