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.
JustNotepad.com - A free online notepad allows you to create any text or notes in your web browser.
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.
TakeNote - A web-based note-taking app with GitHub sync and Markdown support.
Google Keep - Capture notes, share them with others, and access them from your computer, phone or tablet. Free with a Google account.
PlicPad - Shareable notepad without urls