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.

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

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

Volume Control Panel Pro - Volume Control Panel Pro is an efficient mobile app that enables its users to control the volume of the system conveniently.