MicroPython is developed using git for source code management, and the master repository can be found on GitHub at github.com/micropython/micropython.
The full source-code distribution of the latest version is available for download here:
Daily snapshots of the GitHub repository (not including submodules) are available from this server:
Firmware for various microcontroller ports and boards are built automatically on a daily basis and can be found below.
Port: cc3200, esp32, esp8266, mimxrt, nrf, renesas-ra, rp2, samd, stm32
Feature: Audio Codec, BLE, Battery Charging, CAN, Camera, DAC, Display, Dual-core, Environment Sensor, Ethernet, External Flash, External RAM, Feather, IMU, JST-PH, JST-SH, LoRa, Microphone, PoE, RGB LED, SDCard, Secure Element, USB, USB-C, WiFi, microSD, mikroBUS
Vendor: Unexpected Maker [x]
MCU: esp32s3 [x]