Skip to content
EN

Software · Utilities & files

Door Knocker

Check the availability of portals.

  • Completely free
  • Linux
  • Open source

At a glance

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

Its licence (GPL-3.0+) 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

Door Knocker allows you to check availability of all portals provided by xdg-desktop-portal.

Description from Flathub — AppStream (Flathub)

Sources and checks

  • 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)

How listings are built →

Do you develop Door Knocker?

Correct this listing with the report form, or cite it with this optional badge (it shows the verified free status and changes nothing in the ranking):

<a href="https://licitpro.fr/en/resource/door-knocker"><img src="https://licitpro.fr/badge/door-knocker.svg?l=en" alt="Listed on LicitPro" height="20"></a>

Developers and publishers →

In the same category

Bazaar

Software · Open source

Discover and install apps.

Completely freeLinux

Prism Launcher

Software · Open source

Custom Minecraft Launcher to easily manage multiple Minecraft installations at once.

Completely freeWinMacLinux

Gear Lever

Software · Open source

Manage AppImages.

Completely freeLinux

LocalSend

Software · Open source

Share files to nearby devices.

Completely freeWinMacLinuxAndroidiOS

Mission Center

Software · Open source

Monitor system resource usage.

Completely freeLinux

Protontricks

Software · Open source

Apps and fixes for Proton games.

Completely freeLinux