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jdSystemMonitor vs Mission Center: catalog facts
jdSystemMonitor	Mission Center
Free Free and open source under the GPL.	Free Free and open source under the GPL 3.0.
Linux	Linux
Process management plus CPU, RAM and swap monitoring Lists Flatpaks, autostart entries, packages and mounts	Familiar Task Manager layout with per-core and per-process detail GPU usage for AMD, Intel and NVIDIA cards
Linux only No temperature or GPU monitoring mentioned	Linux only Fewer sensors and less depth than a command line monitor
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-only	License: GPL-3.0
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 21, 2026

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