AllMyNotes Organizer is an outliner application for Windows, and it allows you to store all documents and notes in a single storage file.

BeeCanvas is an online whiteboard based visual collaboration tool.

CintaNotes is a freemium Microsoft Windows notetaking program.

Curio is a collection of unique hotels, each with their own history and character in cities across the globe.

Elephant is a notetaker with a classic interface.

footnote is a very light and neat Notebook App for elementary OS.

BasKet Note Pads is a KDE program for organizing, sharing, and taking notes.

CherryTree is an hierarchical note taking application, featuring rich text and syntax highlighting, storing data in a single xml or sqlite file.

ConnectedText is a powerful but simple information management system. It is based on wiki principles.

DEVONthink a document and knowledge management app for the Mac.

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

Google Keep is a cloud based note taking application.