Conexio Technologies' Stratus is an open source LTE-M/NB-IoT Cellular-IoT development kit based around Nordic Semi nRF9160. Stratus can charge battery from solar power & comes with 500 MB global data plan. Stratus will be available on Crowd Supply.
Mbits is a BBC micro:bit compatible STEM educational board from Elecrow based on ESP32 SoC. Mbits costs less than micro:bit and supports Letscode visual programming and Arduino.
tCam-Mini is a wireless thermal imaging module based on ESP32 and FLIR Lepton 3.5 Infrared camera module. The open source project is created by Dan Julio and was crowd funded through Hackster Launch and GroupGets.
Jupiter Nano is a high-performance embedded microprocessor development board that can run Linux and is based on Microchip's ATSAMA5D27C-LD1G. Nano is an open source project created by Adam Feuer from Starcat LLC.
Nordic Semiconductor's nRF9160 is a low power LTE-M and NB-IoT wireless modem available in a small footprint System-in-Package and is targeted for Cellular IoT applications.
QUARK is an open source handheld electrical measurement and debugging tool designed by Sergey Ismulin. It is based on ESP32 and uses the Arduino framework.
BioAmp EXG Pill – Open Source Biopotential Analog Front-end Module can Measure EEG, ECG, EMG and EOG
BioAmp EXG Pill is a single channel biopotential analog front-end module developed by Upside Down Labs. It can measure EEG, ECG, EMG and EOG and the project is completely open source.
µLab Kiwi and Kiwi Lite are beginner friendly Intel/Altera MAX10 FPGA and ESP32 development boards that are soon launching via Crowd Supply.
Srinivasan (Neutrino) has built a digital contact thermometer with display and runs on a coin cell. It has an operating span of 140 days.