Intel NUC - Intel NUCs are available as Kits(Barebones), Boards(Mainbaord only) and as perconfigured Mini-PCs.
Udoo x86 Ultra - Udoo x86 Ultra is a modern PC, known as the most powerful X86 maker board and an Arduino 101 compatible platform.
Radxa Rock - The Radxa Rock steps up the microprocessor game with a quad-core 1.
ESPRESSObin - Electronics, Single Board Computer, and x86
Banana Pi - Banana Pi is a single-board computer made in China. It can run Android, Ubuntu and Debian.
Google Coral - Google Coral is a SBC family designed for AI and ML in the edge. This particular board is a developer kit and is capable of running a full Linux distro.