Agenda - A date-focused note taking app for both planning and documenting your projects.
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.
Notepin - Extremely simple note-taking + blogging ✍️
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.
Bear - Bear.app is a note-taking and content writing app that helps you boost productivity with its intuitive tools.
Google Keep - Capture notes, share them with others, and access them from your computer, phone or tablet. Free with a Google account.