EK-TM4C123GXL Tiva C LaunchPad
An 80 MHz Arm Cortex-M4F LaunchPad built around the TM4C123GH6PM, with USB device and host support plus BoosterPack headers.
Manufacturer library
Exact board pages for widely used TI, ST, Espressif, Arduino, Raspberry Pi and Nordic hardware, linked to the manufacturer’s schematics and design resources.
An 80 MHz Arm Cortex-M4F LaunchPad built around the TM4C123GH6PM, with USB device and host support plus BoosterPack headers.

by MilosRasic98
Open-source device for measuring cardiograpgy signals with a GUI for easier handling and additional software for analyzing the data.

by Mister-Industries
This is the official repo of the tinyCore ESP32-S3 project

by TheusHen
EEGFrontier is an open-source EEG device designed to measure focus and attention during study using real brain signals. It uses a custom-built PCB with a professional EEG analog front-end to capture raw EEG data and stream it in real time to a computer via USB.
by tinkerlog
2D scribbling device
by CalPlug
ADE 7953 Arduino style library (Espressif ESP8266 and ESP32 compatible) and demo board PCB design

by mkaiser
PCB with ESP32 and CAN bus. For controlling CAN-devices like heatpumps via ESPHome
by abw
Hardware and firmware for a 4x4 MIDI merger/splitter patchbay based on an Arduino MEGA 2560
by appfruits
This is the Arduino compatible firmware running Little Helper, a little device that is useful in electronic labs. The firmware also shows how to build a more complex LCD based application, featuring a few standard controls.

by cwgstreet
ESP32 wifi enabled quad temperature probe device to monitor bbq meat / pit temperatures with wireless cloud data logging for remote monitoring and push alert notifications

by ardiloot
ESP32 based differential pressure (and air flow) meter. Handheld, battery powered DIY device for measuring small pressure differences (Sensirion SDP810-500Pa).
by dima-ch
ESP8266 based device for remote control PC via the serial port and power button
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