A community of developers that go by the name switchroot have created the first publicly available Android ROM for the Switch using LineageOS 15.1, an open source operating system designed to extend the functionality and lifespan of mobile devices. The ROM is based on the Nvidia Shield TV trees and supports docked and handheld mode.

Notable features:

  • Team Win Recovery Project comes pre-installed
  • CPU and GPU performance profiles
  • Joycon support

Read more about the Lineage OS ROM here

Switchroot also have a ROM that allows you to run Ubuntu on your Switch

switchroot.org