Evernote is a note taking application which keeps the notes taken in sync across all platforms using its cloud infrastructure.

WizNote is a cross-platform cloud based note-taking client.

Omni Notes open-source note-taking application, designed to be lightweight and simple without giving up smart behavior.

Penzu is a private online diary-hosting website.

NoteLedge note-taking and management solution.

ColorNote is simple and easy to use. In any situation, you can quickly create notes and lists.

GNotes is a simple and clear note app. It is available for you to take notes, keep a diary, write down ideas, create checklists, etc.