Important: LeoDocs.leo (included in all Leo distributions) contains the full source code for all parts of Leo's Users Guide.
What people are saying about Leo
Chapter 2: A Tutorial Introduction to Leo
Chapter 3: Using Leo's Outlines
Chapter 4: Writing Programs in Leo
Chapter 5: Using Leo's Commands
Chapter 6: Leo and Literate Programming
Chapter 7: Scripting Leo with Python
Chapter 10: Theory of Operation
Chapter 14: Using the Rst3 Plugin
Chapter 15: Controlling Syntax Coloring
Chapter 16: Debugging with Leo
Chapter 17: Using ZODB with Leo
Chapter 19: Embedding Leo with the leoBridge Module
Chapter 20: Unit testing with Leo
Chapter 21: ILeo - the IPython bridge
What's new in Leo 4.4.7 and 4.4.8