Joplin - Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, tagged and modified either from the applications directly or from your own text editor.

Orgzly - Outliner for notes, tasks and to-dos

OneNote - Get the OneNote app for free on your tablet, phone, and computer, so you can capture your ideas and to-do lists in one place wherever you are. Or try OneNote with Office for free.

All Note Pro - All Note Pro app contains features to enable users to write their new ideas and important details on their mobile phone to share them with the outside world.

Obsidian Flight School - 🚀Obsidian Flight School is an educational product—and starter kit.

Notin - Notin – notes in notification app helps users in creating alarms to get reminders about important tasks right on the home screen.