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

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