KeyNote is a free notetaking and outlining text editor for Microsoft Windows, produced by Tranglos Software.

Keynote is based on the tree data structure concept, allowing "nodes" in a tree panel (much like the tree panel in Windows file managers) to represent separate fields within a single text file.

Each field is treated as a separate virtual document within the tree.

KeyNote is open-source software developed in Delphi 3.

This Microsoft Windows software-related article is a stub.