QOwnNotes is an open-source plain-text note-taking application. The program supports markdown and includes a to-do list manager and many customization options.
Evernote
Evernote is a note-taking app helping you capture ideas and manage projects using a web clipper, files attachments, audio notes, and more.
Google Keep
Google Keeps is a simple notes organizer that lets you take voice notes, add images to notes, and create a to-do list.
