LoRaWAN is interesting.
RNode - Integrated, long-range data-radio that uses raw LoRa modulation in a variety of frequency bands.
TinyGo - Go compiler for small devices, based on LLVM.
Particle Store - Many cool IOT products to buy.
TinyFPGA - New series of low-cost, open-source FPGA boards in a tiny form factor.
Lacuna - Low-cost, simple and reliable global connections to sensors and mobile equipment.
Tock - Secure embedded operating system for Cortex-M based microcontrollers.