GitHub - ringtailsoftware/commy: A serial monitor for Mac, Linux and Windows
github.com
A serial monitor for Mac, Linux and Windows. Contribute to ringtailsoftware/commy development by creating an account on GitHub.

From the README:

Commy is a small utility used to connect and monitor serial, UART or COM port devices.

Commy runs on Mac, Linux and Windows. Windows support is experimental.

Does (some of) the same things as tio, minicom, screen, miniterm.py, zcom, PuTTY, etc.