They make awesome drawer organizers/dividers. Just separate the top of each box from the bottom and put them both in a drawer with the open side facing up. Repeat with more boxes until the drawer is divided into many compartments. You might need to rearrange them a few times to get a good fit.
I used my old box "collection" to organize numerous iPod/iPhone power supplies, cables, adapters, earbuds, etc., all in one large drawer.