Alternatives to Opal for all platforms with any license

Platforms

Desktop

Mobile

Tablet

  • OmniOutliner icon

    OmniOutliner

    OmniOutliner is a start-to-finish writing app. Perfect for collecting information, outlining Big Ideas, adding structure to any sort of writing, and much more. From grocery lists to email drafts to long-form composition. Write ...

    Commercial Mac iPhone iPad

  • Orgzly icon

    Orgzly

    Outliner for notes and tasks in plain-text.

    Free Android

  • Deep Notes icon

    Deep Notes

    Deep Notes is a simple hierarchical note pad. You can use it to outline ideas, make to-do lists, or whatever else might need jotting down in a list, hierarchical or not. Its keyboard shorcuts were designed to let you edit, navigate...

    Free Mac

  • OutlineEdit icon

    OutlineEdit

    A beautifully crafted outliner for your Mac: It helps you keep your ideas structured and collected. Use OutlineEdit as an empty canvas to sketch information - for learning, working and planning your projects. And highlight...

    Commercial Mac

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