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Osmo

Osmo is a task management program, available on Linux.

  • Completely free
  • Linux
  • Open source

At a glance

All of Osmo is free: no feature is locked behind a paid plan, and its code is open.

Its licence (GPL-2.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

  • Open source code
  • Commercial use allowed

About

Osmo is a handy personal organizer which includes calendar, tasks manager and address book modules. It was designed to be a small, easy to use and good looking PIM tool to help to manage personal information. In current state the organizer is quite convenient in use - for example, user can perform nearly all operations using keyboard. Also, a lot of parameters are configurable to meet user preferences.

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from Official plan pages (pricing, licence, terms) (commercial use) —
  • Facts collected from Flathub (credit card, publisher, licence, free status, platforms, commercial use, version) —
  • Last technical check: 8 November 2026
  • Description from Flathub — AppStream (Flathub)

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