The Raspberry Pi Foundation announced a new model in its line of very inexpensive Linux computers: the Raspberry Pi 3 Model A+. It has many of the same features as the top-of-the-line 3B+ (including a 1.4GHz 64-bit quad-core processor, dual-band wireless LAN, and Bluetooth 4.2/BLE), the main exceptions being 512MB of RAM instead of 1GB, and one USB port as opposed to four. At $25, it looks like a very cool single board computer. ETA Prime has a good informational video about it.