Calendar Note by Enex - Calendar Note app allows users to view the calendar so they can write notes and memos according to dates to get alerts about tasks.

Google Keep - Capture notes, share them with others, and access them from your computer, phone or tablet. Free with a Google account.

StyleNote Notes & Memos - StyleNote Notes & Memos app offers features that let you write noes using an extensive collection of fonts and font colors.

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.

Taskito - Taskito app offers features that let you boost up your productivity by creating lists of tasks to keep track of all your projects and life goals.

Standard Notes - A safe place for your notes, thoughts, and life's work