Here’s a brief version of Cocos Creator License:
LICENSE AGREEMENT
For purposes of this License Agreement, Cocos Creator created by Beijing Chukong Aipu Technology Co., Ltd is a cross-platform desktop software for developing game software and interactive rich media that can be published to Android, iOS, Web Standard, Windows and Mac.
Cocos Creator as a software includes open sourced JavaScript game engine, editor extension and C++ game engine. It also includes close sourced editor program.
Open sourced JavaScript and C++ game engine, with editor extension can be modified and customized by developer user. The modified and customized version of software can be used to develop game software and interactive rich media for end users, but not allowed to redistribute or publish game develop software based on Cocos Creator's open sourced code.
Cocos Creator are licensed to you subject to the terms of this License Agreement ("License
Agreement"). This License Agreement forms a legally binding contract between you and Beijing Chukong Aipu Technology Co., Ltd, a Chinese Beijing corporation located at Room 323101, Building 5, Yard 1, Futong East Street, Chaoyang District, Beijing 100102, China ("Chukong Aipu ") in relation to your use of Cocos Creator.
In order to use Cocos Creator, you must first agree to this License Agreement. By downloading, installing, copying or otherwise using Cocos Creator, you accept the terms and conditions of this License Agreement. If you do not agree with any of the terms or conditions of this License Agreement, do not proceed with downloading, copying, installing or any other use of Cocos Creator or any portion thereof as you have no rights to do so.
THIS SOFTWARE IS PROVIDED BY ESOTERIC SOFTWARE "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTARE BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Some modules of Cocos Creator is open sourced, including JavaScript and C++ engine and some plugin packages.
Open sourced engine repos: