API bindings, libstd, and Cargo integration for running Rust applications on a Zephyr kernel

A secure embedded operating system for microcontrollers

Reactive Extensions for C++

A (paused) work-in-progress long-range, low-bandwidth wireless disaster recovery mesh network powered by the sun.

Software tools/utilities made by others to augment the KiCad PCB EDA suite.

Java Library for LWM2M

nRF51822 and nRF52832 based baords, e.g. BLE Nano, RBL_nRF51822, Nano 2 and Blend 2