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CoreX vs GKrellM: catalog facts
CoreX	GKrellM
Free Free and open source under the MIT licence.	Free Free and open source.
Linux	Linux
Always-on-top draggable widget with live metrics HWiNFO-style sensor tree with real sensor names	Many monitors in one compact window Sensor readings with alarms
Linux only Small project with a single maintainer	Sensor support depends on kernel and hardware Old-fashioned look compared with modern widgets
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License not stated
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 October 1, 2026

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