Vim

VIM LICENSE

I) There are no restrictions on distributing unmodified copies of Vim except that they must include this license text. You can also distribute unmodified parts of Vim, likewise unrestricted except that they must include this license text. You are also allowed to include executables that you made from the unmodified Vim sources, plus your own usage examples and Vim scripts.

II) It is allowed to distribute a modified (or extended) version of Vim, including executables and/or source code, when the following four conditions are met:

     1) This license text must be included unmodified.

     2) The modified Vim must be distributed in one of the following five ways:

          a) If you make changes to Vim yourself, you must clearly describe in the distribution how to contact you. When the maintainer asks you (in any way) for a copy of the modified Vim you distributed, you must make your changes, including source code, available to the maintainer without fee. The maintainer reserves the right to include your changes in the official version of Vim. What the maintainer will do with your changes and under what license they will be distributed is negotiable. If there has been no negotiation then this license, or a later version, also applies to your changes. The current maintainer is Bram Moolenaar <Bram@vim.org>. If this changes it will be announced in appropriate places (most likely vim.sf.net, www.vim.org and/or comp.editors). When it is completely impossible to contact the maintainer, the obligation to send him your changes ceases. Once the maintainer has confirmed that he has received your changes they will not have to be sent again.

          b) If you have received a modified Vim that was distributed as mentioned under a) you are allowed to further distribute it unmodified, as mentioned at I). If you make additional changes the text under a) applies to those changes.

          c) Provide all the changes, including source code, with every copy of the modified Vim you distribute. This may be done in the form of a context diff. You can choose what license to use for new code you add. The changes and their license must not restrict others from making their own changes to the official version of Vim.

          d) When you have a modified Vim which includes changes as mentioned under c), you can distribute it without the source code for the changes if the following three conditions are met:
          - The license that applies to the changes permits you to distribute the changes to the Vim maintainer without fee or restriction, and permits the Vim maintainer to include the changes in the official version of Vim without fee or restriction.
          - You keep the changes for at least three years after last distributing the corresponding modified Vim. When the maintainer or someone who you distributed the modified Vim to asks you (in any way) for the changes within this period, you must make them available to him.
          - You clearly describe in the distribution how to contact you. This contact information must remain valid for at least three years after last distributing the corresponding modified Vim, or as long as possible.

          e) When the GNU General Public License (GPL) applies to the changes, you can distribute the modified Vim under the GNU GPL version 2 or any later version.

     3) A message must be added, at least in the output of the ":version" command and in the intro screen, such that the user of the modified Vim is able to see that it was modified. When distributing as mentioned under 2)e) adding the message is only required for as far as this does not conflict with the license used for the changes.

     4) The contact information as required under 2)a) and 2)d) must not be removed or changed, except that the person himself can make corrections.

III) If you distribute a modified version of Vim, you are encouraged to use the Vim license for your changes and make them available to the maintainer, including the source code. The preferred way to do this is by e-mail or by uploading the files to a server and e-mailing the URL. If the number of changes is small (e.g., a modified Makefile) e-mailing a context diff will do. The e-mail address to be used is <maintainer@vim.org>

IV) It is not allowed to remove this license from the distribution of the Vim sources, parts of it or from a modified version. You may use this license for previous Vim releases instead of the license that they came with, at your option.

VIM LICENSE

I)  There are no restrictions on distributing unmodified copies of Vim except
    that they must include this license text.  You can also distribute
    unmodified parts of Vim, likewise unrestricted except that they must
    include this license text.  You are also allowed to include executables
    that you made from the unmodified Vim sources, plus your own usage
    examples and Vim scripts.

II) It is allowed to distribute a modified (or extended) version of Vim,
    including executables and/or source code, when the following four
    conditions are met:
    1) This license text must be included unmodified.
    2) The modified Vim must be distributed in one of the following five ways:
       a) If you make changes to Vim yourself, you must clearly describe in
	  the distribution how to contact you.  When the maintainer asks you
	  (in any way) for a copy of the modified Vim you distributed, you
	  must make your changes, including source code, available to the
	  maintainer without fee.  The maintainer reserves the right to
	  include your changes in the official version of Vim.  What the
	  maintainer will do with your changes and under what license they
	  will be distributed is negotiable.  If there has been no negotiation
	  then this license, or a later version, also applies to your changes.
	The current maintainer is Bram Moolenaar <Bram@vim.org>. If this 
	  changes it will be announced in appropriate places (most likely
	  vim.sf.net, www.vim.org and/or comp.editors).  When it is completely
	  impossible to contact the maintainer, the obligation to send him
	  your changes ceases.  Once the maintainer has confirmed that he has
	  received your changes they will not have to be sent again.
       b) If you have received a modified Vim that was distributed as
	  mentioned under a) you are allowed to further distribute it
	  unmodified, as mentioned at I).  If you make additional changes the
	  text under a) applies to those changes.
       c) Provide all the changes, including source code, with every copy of
	  the modified Vim you distribute.  This may be done in the form of a
	  context diff.  You can choose what license to use for new code you
	  add.  The changes and their license must not restrict others from
	  making their own changes to the official version of Vim.
       d) When you have a modified Vim which includes changes as mentioned
	  under c), you can distribute it without the source code for the
	  changes if the following three conditions are met:
	  - The license that applies to the changes permits you to distribute
	    the changes to the Vim maintainer without fee or restriction, and
	    permits the Vim maintainer to include the changes in the official
	    version of Vim without fee or restriction.
	  - You keep the changes for at least three years after last
	    distributing the corresponding modified Vim.  When the maintainer
	    or someone who you distributed the modified Vim to asks you (in
	    any way) for the changes within this period, you must make them
	    available to him.
	  - You clearly describe in the distribution how to contact you.  This
	    contact information must remain valid for at least three years
	    after last distributing the corresponding modified Vim, or as long
	    as possible.
       e) When the GNU General Public License (GPL) applies to the changes,
	  you can distribute the modified Vim under the GNU GPL version 2 or
	  any later version.
    3) A message must be added, at least in the output of the ":version"
       command and in the intro screen, such that the user of the modified Vim
       is able to see that it was modified.  When distributing as mentioned
       under 2)e) adding the message is only required for as far as this does
       not conflict with the license used for the changes.
    4) The contact information as required under 2)a) and 2)d) must not be
       removed or changed, except that the person himself can make
       corrections.

III) If you distribute a modified version of Vim, you are encouraged to use
     the Vim license for your changes and make them available to the
     maintainer, including the source code.  The preferred way to do this is
     by e-mail or by uploading the files to a server and e-mailing the URL.
     If the number of changes is small (e.g., a modified Makefile) e-mailing a
     context diff will do.  The e-mail address to be used is
<maintainer@vim.org> 

IV)  It is not allowed to remove this license from the distribution of the Vim
     sources, parts of it or from a modified version.  You may use this
     license for previous Vim releases instead of the license that they came
     with, at your option.


Note:

- If you are happy with Vim, please express that by reading the rest of this
  file and consider helping needy children in Uganda.

- If you want to support further Vim development consider becoming a
  |sponsor|.  The money goes to Uganda anyway.

- According to Richard Stallman the Vim license is GNU GPL compatible.
  A few minor changes have been made since he checked it, but that should not
  make a difference.

- If you link Vim with a library that goes under the GNU GPL, this limits
  further distribution to the GNU GPL.  Also when you didn't actually change
  anything in Vim.

- Once a change is included that goes under the GNU GPL, this forces all
  further changes to also be made under the GNU GPL or a compatible license.

- If you distribute a modified version of Vim, you can include your name and
  contact information with the "--with-modified-by" configure argument or the
  MODIFIED_BY define.