FairNote - FairNote app allows users to increase their productivity and efficiency by writing notes and by making to-do lists, so they don’t forget any important task.

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.

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

Gone - An ephemeral to-do list

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.

GitJournal - Manage your Notes from any Git Repo.