Orgzly

Orgzly stores notebooks in plain-text and keeps them where you choose to.

• Create, edit and delete notes and tasks
• Collapse and expand sub-notes
• Schedule tasks and set their deadlines
• Set priorities and tags for notes
• Fling notes left or right to open quick-menus
• Search notes by various properties
• Create and save searches for quick access
• Synchronize notebooks with one or more directories

Notebooks are saved in Org mode's file format. "Org mode is for keeping notes,
maintaining TODO lists, planning projects, and authoring documents with a fast
and effective plain-text system." See https://orgmode.org/ for more information.