##Licensing for Grbl v0.9:

####Note from the Grbl v0.9 author:

After releasing Grbl v0.8 (and prior) under the permissive MIT-license, several commercial entities have inquired about obtaining an MIT-license for the latest version, Grbl v0.9, to use in their proprietary products. At the time, Grbl v0.9 was developed under the "copy-left" GPLv3 license. While the strong interest was extremely humbling, it brought up some concerns about taking steps to protect Grbl for the open-source community but to still allow use for entrepreneurs. While the path forward is being worked out, Grbl v0.9 will remain under the GPLv3 license, and all older versions will remain open and permissive under the MIT-license.

Grbl(tm) v0.9 is free software distributed under the terms of the GPLv3 license reproduced below (See COPYING for more details.) Grbl v0.9 is certified open-source software, is not in the public domain, and its authors retain its copyright.

Grbl v0.9 is built upon the previous work in Grbl v0.8, which was released under the MIT-license.

  Grbl(tm) v0.9
  Copyright (c) 2012-2014 Sungeun K. Jeon

  Grbl v0.9 is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  Grbl v0.9 is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with Grbl v0.9.  If not, see <http://www.gnu.org/licenses/>.

##Licensing for Grbl v0.8 (and prior):

Grbl(tm) v0.8 is free software distributed under the terms of the MIT License reproduced below. GRBL v0.8 may be used for any purpose, including commercial purposes, at absolutely no cost. No paperwork, no royalties, no GNU-like "copyleft" restrictions, either. Just download it and use it.

Grbl v0.8 is certified open-source software. Its license is simple, liberal, and compatible with GPL. Grbl v0.8 is not in the public domain and its authors retain its copyright.

The spirit of the Grbl v0.8 license is that you are free to use GRBL for any purpose at no cost without having to ask us. The only requirement is that if you use GRBL v0.8, then you should give us credit by including the copyright notice somewhere in your product documentation. A nice, but optional, way to give us further credit is to include a statement like "This product contains source code from the Grbl CNC project" and link to our site in a web page for your product.

Grbl v0.8 has been entirely designed, implemented, and maintained by the authors of Grbl v0.8 and its altruistic contributors.

The MIT License (MIT)

GRBL(tm) v0.8 - Embedded CNC g-code interpreter and motion-controller
Copyright (c) 2009-2011 Simen Svale Skogsrud
Copyright (c) 2011-2013 Sungeun K. Jeon
Copyright (c) 2011 Jens Geisler

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.