ImbueYouIDo on Etsy has some really unique handmade save the dates and invitations, but these floppy disks are my favorite! All of their work is gorgeous but these would be the perfect way to tell everyone that your wedding might be a little nerdier than normal. The labels are available in a variety of colors, and they offer a wide range of amounts, from 25 all the way up to 225.
If you want a different design on your labels, it looks like ImbueYouIDo offers a lot of customization options, and these could probably also by DIY-ed fairly easily if you’re good with typography and spray adhesive. Quick, find that old box full of floppys!