Beaded Stitch Markers

OK seeing as how I have a crap ton of beads around the house, I have to make these (these photos were just random ones I found online; I did not make these):
Crochet stitch markers:

These have the lobster claw clasp on them to make them easy to move around on the work as you go.

Knitting stitch markers:

I don't knit with needles, but my guess is, these are placed on the needles to indicate where to knit and where to purl. Or to indicate where the beginning is when knitting in the round.

I could SO make some of these!