MagicMirror² is described as 'Open source modular smart mirror platform. Based on the Electron application wrapper and tested (but not limited to) Raspberry Pi single board computers' and is an app in the online services category. There are five alternatives to MagicMirror² for a variety of platforms, including Linux, Wayland, Python, GTK and Typescript apps. The best MagicMirror² alternative is Conky, which is both free and Open Source. Other great apps like MagicMirror² are Eww, fabric (Desktop Widgets System), Ignis (widget framework) and AGS.
Conky is a free, light-weight system monitor for X, that displays any kind of information on your desktop. Originally a fork of Torsmo, Conkys torsmo-based code is BSD licensed. New code in Conky has been licensed under the GPL 3.0.
Elkowars Wacky Widgets is a standalone widget system made in Rust that allows you to implement your own, custom widgets in any window manager.
The next-generation framework for building desktop widgets using Python.
A widget framework for building desktop shells, written and configurable in Python
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Conky is not even close to magic mirror. Magic Mirror is a digital dashboard for displaying calender, weather, etc. Conky is for monitoring system monitoring.