There are many different kinds of cast ons. Most of them can be used interchangeably, but others are used for specific purposes.
Slip Knot - most cast ons start with a slip knot that you slide onto one of your needles.
Long Tail Cast On - a stretchy and versatile cast on. Our favorite!
Knit On Cast On - an easy cast on if you've knit before, since it's very similar to the knit stitch.
Cable Cast On (coming soon!) - usually used to cast on in the middle of projects.
Backwards Loop Cast On (coming soon!) - the easiest, but also the least forgiving, cast on.
Provisional Cast On (coming soon!) - used to keep stitches "live" so they can be picked up later without leaving a seam.
Circular Cast On (coming soon!) - for working in the round from the center, out. Perfect for toe-up socks!