A list of the 11 libraries in the architecture nrf52.

Adafruit LittlevGL Glue Library Simplifies use of LittlevGL library with Adafruit displays.
Adafruit Protomatter This is a library for the Adafruit RGB LED matrix.
Arduino Low Power Power save primitives features for SAMD and nRF52 32bit boards
BSEC Software Library Bosch Sensortec Environmental Cluster (BSEC) Software library
Codec2 The Codec2 library is a proof-of-concept for running the Codec2 audio codec on an Arduino-compatible Adafruit Feather nRF52 Bluefruit LE board.
LoRa Node LoRa Node library for Arduino LoRa Node Shield.
nrf_rng True non-deterministic random numbers for nRF5 series chips. MIT License.
Servo Allows Arduino/Genuino boards to control a variety of servo motors.
SPIMemory SPI Memory library for Arduino. (Formerly SPIFlash)
SX126x-Arduino Arduino library to use Semtech SX126x LoRa chips and modules to communicate
Thermal Printer Library Bluetooth Low Energy Thermal Printer Library