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Plasma System Monitor vs CoreX: catalog facts
Plasma System Monitor	CoreX
Free Free and open source, developed by the KDE community.	Free Free and open source under the MIT licence.
Linux	Linux
Shows sensors, processes and resource usage in one window Customizable monitoring pages	Always-on-top draggable widget with live metrics HWiNFO-style sensor tree with real sensor names
Linux only Most at home on a KDE Plasma desktop	Linux only Small project with a single maintainer
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0-only OR GPL-3.0-only	License: MIT
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.