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.

Documize - Enterprise-grade wiki and knowledge management platform

Floating Notes - Floating Notes app enables users to create sticky notes to view all their daily tasks on the home screen, so they don’t forget anything important.

HackMD - Fast and flexible, real-time collaborative markdown, inspired by Hackpad.

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.

ReadTheDocs - Spend your time on writing high quality documentation, not on the tools to make your documentation work.