A list of the 9 libraries in the architecture megaavr.

ArduinoBLE Enables BLE connectivity on the Arduino MKR WiFi 1010, Arduino UNO WiFi Rev.2, Arduino Nano 33 IoT, and Arduino Nano 33 BLE.
ArduinoECCX08 Arduino Library for the Atmel/Microchip ECC508 and ECC608 crypto chips
BeaconNano Create a Beacon from an Arduino Nano Ble
MFRC522 Arduino RFID Library for MFRC522 (SPI)
OneWireNg Arduino 1-wire service library
Servo Allows Arduino/Genuino boards to control a variety of servo motors.
ServoEasing Extends Arduino Servo library for smooth servo movement.Linear as well as other ease movements for all servos are provided. The Arduino Servo library or PCA9685 servo expanders are supported.
ThingSpeak ThingSpeak Communication Library for Arduino, ESP8266 & EPS32
ThingSpeak_asukiaaa An API manager for ThingSpeak