Open hardware projects tagged altium-designer on BoardRepo. View schematics and PCBs in the browser and download the sources.
An upgraded Adafruit Macropad with easier macro-layer-switching using additional NeoKey buttons (and OLED display). Also includes keyboard-layout switching and dimming as well as a lot of macro-definitions.
STLINK v2 clone schematic
Blueshift Robotics Motherboard Design Files