Stickermule kindly sponsored Open Source Design Summit with 750 USD sticker credits! This is enough to cover some great swag until FOSDEM next year! It would be great if we can gather sticker ideas and files here which we can order afterwards.
e.g: @dmichl suggested to create Hexagon stickers which I think is a great idea.
Keep in mind that we can also create magnets, buttons, bags and similar things, have a look yourself to see if there is something we can use: