Leo: a programmer's editor & more Files

Leo 5.3-final May 2, 2016

[Leo](http://leoeditor.com/) 5.3-final is now available on [SourceForge](http://sourceforge.net/projects/leo/files/Leo/). Leo is a PIM, an IDE and an outliner.

**The highlights of Leo 5.3**

- Leo now supports Jupyter Notebook (.ipynb) files.
- @chapter is now allowed anywhere. No need for @chapters.
- Faster spell checking.
- The rst3 command supports @rst-table.
- The show-invisibles command now uses native Qt characters.
- Dozens of other improvements and bug fixes.

**Leo is**:

- An outliner. Everything in Leo is an outline.
- A Personal Information Manager.
- A browser with a memory.
- A powerful scripting environment.
- A tool for studying other people's code.
- A fully-featured IDE, with emacs-like commands.
- Extensible via a simple plugin architecture.
- A tool that plays well with  IPython, vim and xemacs.
- Written in 100% pure Python
- Compatible with Python 2.6 and above or Python 3.0 and above.

**Leo's unique features**:
    
- Always-present, persistent, outline structure.
- Leo's underlying data is a Directed Acyclic Graph.
- Clones create multiple views of an outline.
- A simple, powerful, outline-oriented Python API.
- Scripts and programs can be composed from outlines.
- Importers convert flat text into outlines.
- Scripts have full access to all of Leo's sources.
- Commands that act on outline structure.
  Example: the rst3 command converts outlines to reStructuredText.
- @test and @suite scripts create unit tests automatically.
- @button scripts apply scripts to outline data.
- Outline-oriented directives.

Simulating these features in vim or Emacs is possible, just as
it is possible to simulate Python in assembly language...

**Links**

- [Leo's home page](http://leoeditor.com)
- [Documentation](http://leoeditor.com/leo_toc.html)
- [Tutorials](http://leoeditor.com/tutorial.html)
- [Video tutorials](http://leoeditor.com/screencasts.html)
- [Forum](http://groups.google.com/group/leo-editor)
- [Download](http://sourceforge.net/projects/leo/files/)
- [Leo on Github](https://github.com/leo-editor/leo-editor)
- [What people are saying about Leo](http://leoeditor.com/testimonials.html)
- [A web page that displays .leo files](http://leoeditor.com/load-leo.html)
- [More links](http://leoeditor.com/leoLinks.html)