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.

Stylus Labs Write - Write is a word processor for handwriting, designed primarily for tablets with an active stylus.

Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.

Getodo - colorful lightweight multi-level to-do list on Android, iOS, web.

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.

Keeeb - Keeeb unleashes knowledge that the corporate enterprise didn't know it had. We connect existing information islands while optimizing the discovery process with a novel workflow, and automate knowledge discovery through artificial intelligence.