The PocketBone is an open source miniaturized Linux computer small enough to fit into a "mints" tin. The source materials can be found on the project's Hackaday page.
For those who may want to build their own PocketBone and would like to purchase all the supplies from Digi-Key, I've converted the official bill of materials from Hackaday into Digi-Key part numbers. The only part Digi-Key does not stock or have an alternate for was the SD card receptacle. This Digi-Key cart has all the applicable parts and quantities pre-loaded.