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btop++Xfce Task Manager
Free

Free and open source, funded by donations.

 Free

Free and open source, part of the Xfce project.

macOS, Linux, Command line Linux
  • Sortable, filterable process list with per-process detail, driven by mouse or keyboard
  • Graphs for CPU, memory, disks and network in one screen
  • Light on resources
  • Process tree view and name filter
  • No native Windows build; on Windows you need WSL
  • It reports and does not manage: there is no alerting or historical logging
  • Fewer features than full system monitors
  • No disk or network graphs mentioned
Downloadable app Downloadable app
Open source Open source
License: Apache-2.0 License not stated
No account needed No account needed
Works offline Works offline

Checked September 20, 2026

Checked October 1, 2026

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