Evernote
Freemium
Evernote is a note taking application which keeps the notes taken in sync across all platforms using its cloud infrastructure.
CherryTree
Open Source
CherryTree is an hierarchical note taking application, featuring rich text and syntax highlighting, storing data in a single xml or sqlite file.
Quip
Commercial
Quip is a collaborative productivity software suite for mobile and the Web.
The Guide
Open Source
Guide is an application that allows you create documents ("guides") which inherently have a tree (which you can modify as you please) and text associated wit…
Elephant
Open Source
Elephant is a notetaker with a classic interface.
