.. @+leo-ver=5-thin
.. @+node:ekr.20100805165051.7148: * @file frontMatter.txt
.. @@language rest
.. @@tabwidth -4

.. @+at @rst-options
..  call_docutils=False
..  code_mode=False
..  generate_rst=True
..  http_server_support = False
..  show_organizer_nodes=True
..  show_headlines=True
..  show_leo_directives=True
..  stylesheet_path=..\doc
..  write_intermediate_file = True
..  verbose=True
.. @@c

.. @+all
.. @+node:ekr.20040414172212: ** @rst html\frontMatter.html
############
Front Matter
############

.. contents::
    :depth: 2

.. @+node:ekr.20050812134441: *3* @rst-no-head Links
.. External links...
.. _`Open Software`:    http://www.opensource.org/
.. _Python:             http://www.python.org/
.. _`SourceForge`:      http://sourceforge.net/projects/leo/

.. Relative links...
.. _clones:             intro.html#clones-views
.. _leo:                front.html
.. _outline:            intro.html#introduction
.. _outlines:           intro.html#introduction
.. _plugins:            intro.html#plugins-settings
.. _scripting:          intro.html#scripting-leo
.. _users:              http://sourceforge.net/projects/leo/
.. @+node:ekr.20040414172218.4: *3* Acknowledgements
Leo owes much of its visual design to MORE, possibly the most elegant
computer program ever written. Leo's clone nodes are inspired by MORE.

The following people have made generous donations to the Leo project:
Robert Low, Nic Cave-Lynch.

The following people reported bugs, answered questions, and made suggestions for
improving Leo:
Alex Abacus, Shakeeb Alireze, Steve Allen, Bruce Arnold,
Chris Barker, Dennis Benzinger, David Boddie, Jason Breti, Eric Brown, Terry Brown,
Darius Clarke, Martin Clifford, Jason Cunliffe,
Josef Dalcolmo, Gil Dev, Bill Drissel, Wenshan Du,
Allen Edwards, Chris Elliot, Dethe Elza, Mark Engleberg, Roger Erens, 
Stephen Ferg, Tom Fetherston, Tomaz Ficko, Niklas Frykholm,
Fred Gansevles, Jonathan M. Gilligan, Zak Greant, Thomas Guettler, Romain Guy,
Dave Hein, Tiago Castro Henriques, Gary Herron, Steve Holden, Klass Holwerda, Matthias Huening, Robert Hustead,
John Jacob, Paul Jaros, Christopher P. Jobling, Eric S. Johansson, Garold Johnson, 
James Kerwin,
Nicola Larosa, David LeBlanc, Chris Liechti, Steve Litt, Martin v. Löwis (Loewis), Robert Low, Fredrik Lundh,
Michael Manti, Alex Martelli, Marcus A. Martin, Gidion May, David McNab, Frank Merenda, Martin Montcrieffe, Will Munslow,
Chad Netzer, Derick van Niekerk, Jeff Nowland,
Naud Olivier, Joe Orr,
Marc-Antoine Parent, Paul Paterson, Sean Shaleh Perry, Tim Peters, David Priest, Gary Poster, Scott Powell,
Bruce Rafnel, Walter H. Rauser, Olivier Ravard, David Speed Ream, Rich Ries, Aharon Robbins, Guido van Rossum, David Rowe,
Davide Salomoni, Steven Schaefer,Johannes Schöön, Wolfram Schwenzer, Casey Wong Kam Shun,
Gil Shwartz, Jim Sizelove, Paul Snively, Jurjen Stellingwerff, Phil Straus, David Szent-Györgyi,
Kent Tenney, Jeffrey Thompson,
Gabriel Valiente, Jim Vickroy, Tony Vignaux, Tom van Vleck,
Kevin Walzer, Ying-Chao Wang, Cliff Wells, Dan Wharton, John Wiegley, Wim Wijnders, Dan Winkler, 
Vadim Zeitlin.

The following have contributed plugins to Leo:

Rodrigo Benenson, Pierre Bidon, Felix Breuer, Terry Brown,
Mike Crowe,
Josef Dalcolmo, Michael Dawson,
e, Roger Erens, 
Andrea Galimberti, Engelbert Gruber,
Timo Honkasalo,
Jaakko Kourula, Maxim Krikun,
Zhang Le, LeoUser,
Frédéric Momméja, Bernhard Mulder, 
Mark Ng,
Alexis Gendron Paquette, Paul Paterson,
Dan Rahmel,
Davide Salomoni,
Ed Taekema, Kent Tenney, Brian Theado,
Ville M. Vainio,
Steve Zatz.
.. @+node:ekr.20040416080538: *4* @rst-no-head special mentions
The following deserve special mention:
David Brock wrote TSyntaxMemo.
The late Bob Fitzwater kept me focused on design.
Donald Knuth invented the CWEB language.
Jonathan M. Gilligan showed how to put the Leo icon in Leo's windows.
Joe Orr created XSLT stylesheets for Leo; see http://www.jserv.com/jk_orr/xml/leo.htm.
Joe Orr also created an outstanding set of tutorials for Leo; see http://www.evisa.com/e/sb.htm.
LeoUser (B.H.) contributed numerous plugins and was the inspiration for Leo's minibuffer.
LeoUser also wrote jyLeo: Leo for Jython.
The late Bernhard Mulder proposed a new way of untangling external files.
John K. Ousterhout created tcl/Tk. Neal Norwitz wrote PyChecker.
Marc-Antoine Parent urged me to use XML for Leo's file format and helped improve it.
Paul Paterson suggested the plugin architecture,
suggested an approach to spell checking and has contributed many excellent plugins.
François Pinard wrote pymacs.
Norman Ramsey created noweb and gave permission to quote from the noweb web documentation.
Rich Ries has contributed a huge number of suggestions.
Steven P. Schaefer pointed out major security problems lurking in hooks.
Gil Shwartz helped with unicode support.
Phil Straus has been a great friend and constant support.
Guido van Rossum created Python, Tkinter and the Python License.
Dave Winer created MORE.
Ville M. Vainio created ILeo and has made many other valuable contributions to Leo.
Dan Winkler helped support Leo on the Mac.

Special thanks to my family.
My brother, David Speed Ream, tested Leo and made many useful suggestions.
Rebecca, James and Linda make it all worthwhile.
It was during a conversation with Rebecca that I realized that MORE could be used as a prototype for Leo.
That was a crucial first step.
.. @+node:ekr.20040414172218.5: *3* @rst-ignore Python Copyright
All parts of Leo are distributed under the following copyright. This is intended
to be the same as the Python license, namely that Leo is absolutely free, even
for commercial use, including resale. There is no GNU-like "copyleft"
restriction. This license is compatible with the GPL.

Copyright 1997-2009 by Edward K. Ream. All Rights Reserved. Permission to use,
copy, modify, and distribute this software and its documentation for any purpose
and without fee is hereby granted, provided that the above copyright notice
appears in all copies and that both that copyright notice and this permission
notice appear in supporting documentation, and that the names of Edward K. Ream
or Leo may not be used in advertising or publicity pertaining to distribution of
the software without specific, prior written permission from Edward K. Ream.
.. @+node:ekr.20090221070927.1: *3* Leo's MIT License
All parts of Leo are distributed under the following copyright. This is intended
to be the same as the MIT license, namely that Leo is absolutely free, even for
commercial use, including resale. There is no GNU-like "copyleft" restriction.
This license is compatible with the GPL.

**Copyright 1997-2010 by Edward K. Ream. All Rights Reserved.**

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

**THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.**
.. @+node:ekr.20040414174439: *3* @rst-ignore DISCLAIMER OF LIABILITY
**EDWARD K. REAM (REAM) SPECIFICALLY DISCLAIMS ALL WARRANTIES, EXPRESSED OR
IMPLIED, WITH RESPECT TO THIS COMPUTER SOFTWARE, INCLUDING BUT NOT LIMITED TO
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN
NO EVENT SHALL REAM BE LIABLE FOR ANY LOSS OF PROFIT OR ANY COMMERCIAL DAMAGE,
INCLUDING BUT NOT LIMITED TO SPECIAL, INCIDENTAL, CONSEQUENTIAL OR OTHER
DAMAGES.**
.. @+node:ekr.20040414172218.2: ** @rst-ignore Old Preface
Leo_ has thousands of users_. Like me, many of them would never willingly be without Leo again.
Here are Leo's essential features:

1.  Leo outlines_ show you the big picture at all times,
    while providing unlimited space for details.

2.  Leo outlines_ can organize any kind of data:
    computer programs, web sites, documentation, pictures, whatever.

3.  Clones_ allow multiple views of the data within a *single* outline_.
    You don't have to choose the 'correct' view; you can see data in many ways.

4.  Plugins_ allow Leo's users to add new features to Leo.
    Many of Leo's most successful features started life this way.

5.  Leo is a superb scripting_ environment for Python.
    Scripts contained in a Leo outline_ have easy access to all the outline's data.
    It is natural to organize Leo outlines to make life easier for scripts.

6.  Leo is `Open Software`_, written in 100% pure Python_.
    Leo runs wherever Python does.

Leo has a strong and active community of users on `SourceForge`_.
Working with this community has been a constant source of joy and inspiration.
Suggestions and plugins from users continue to drive Leo in excellent new directions.
Who knows what the next plugin will bring? -- Edward K. Ream, September, 2005
.. @-all
.. @-leo
