Real-time operating system kernel (Mynewt OS)
Bluetooth Low Energy stack (BLE 5) - choose HOST only or CONTROLLER only or FULL stack.
Bluetooth Low Energy Mesh
Command line package management and build system (Newt Tool)
Hardware Abstraction Layer unifying common MCU features, see discussion thread
Board Support Infrastructure
System level logs and statistics
Secure bootloader, signed images and remote firmware upgrade
Flash circular buffers, Newtron Flash File System (nffs), or hook up any other file system
Serial upgrade of bootloader, see discussion thread
WiFi support via socket interface, join discussion here
Sensor API, see discussion thread
Support for MIPS architecture (PIC32 boards)
Support for RISCV architecture (HiFive1 boards)
Basic IP support
Full IP support for selected boards (currently STM32F7/F4 and PIC32MZ)
Low power support with ability for drivers to switch low power settings automatically (Nordic and Dialog boards)
USB support

For features in each release, see Release Notes