The device contains a "mainboard" which connects various modules: STM32F4 MCU module, Display module, LiIon/Lipo charger module, buzzer module, and input modules. All modules can be used separately in many hobby projects.I have developed all the software and hardware: I traced all module PCBs, ordered the parts, soldered components to the boards, developed and printed plastic parts using my 3D printer, and, of course, I developed some libraries (which I called DevCore) that allow easily develop applications that can use a display, a touchscreen, a buzzer and various inputs (buttons/encoders/joysiticks). For example, Mario-style game can be run at ~28-29 FPS on that device. In the future I plan to create various add-ons to DevBoy (for instance, an oscilloscope), as well as miscellaneous open hardrware modules for different projects, and various open source DevCore software libraries.
Website: devboy.us