MagKey EDC Key Holder
A good key organizer can be a godsend for taming that unruly keychain, but naturally they all add some bulk. Not the MagKey EDC Key Holder, which instead turns your keys into the key holder themselves thanks to tiny, lightweight neodymium magnets that stick to them using 3M adhesive. They include in both positive and negative variants for each side of each key and effectively work with any type, reducing both rattle and the space they take in your pocket.
Hit up Kickstarter for details – $10