Update README.md (#6286)

Added license description for 3'rd party licenses.
Updated readme with list of current SDKs

Author: ianpward

README.md

@@ -1,16 +1,21 @@
 ![Realm](doc/logo.png)
 
-Realm is a mobile database that runs directly inside phones, tablets or wearables - check out [realm.io](https://realm.io). 
+Realm is a mobile database that runs directly inside phones, tablets or wearables - check out [realm.io](https://realm.io).
 
 This repository holds the source code for the core database component used by all the Realm Mobile Database products:
+
+* [Realm C++](https://github.com/realm/realm-cpp)
+* [Realm Dart/Flutter](https://github.com/realm/realm-dart)
 * [Realm Java](https://github.com/realm/realm-java)
-* [Realm Objective-C](https://github.com/realm/realm-cocoa)
-* [Realm React Native](https://github.com/realm/realm-js)
-* [Realm Swift](https://github.com/realm/realm-cocoa)
+* [Realm Kotlin](https://github.com/realm/realm-kotlin)
+* [Realm Swift/Objective-C](https://github.com/realm/realm-swift)
 * [Realm .NET](https://github.com/realm/realm-dotnet)
+* [Realm Node.js/React Native/Web](https://github.com/realm/realm-js)
 
 Realm Core is not in itself an "end-user" product with a publicly stable and supported API.
 
+Refer to the [Realm documentation](https://www.mongodb.com/docs/realm) for information about Realm and using the SDKs.
+
 ## Building Realm
 
 How to build Realm Core is described [here](how-to-build.md).
@@ -27,12 +32,13 @@ unacceptable behavior to [[email protected]](mailto:community-conduc
 
 ## License
 
-Realm Core is published under the Apache 2.0 license. 
+Realm Core is published under the Apache 2.0 license.
 
-Please also see THIRD-PARTY-NOTICES for and licenses related to included third party libraries.
+See the THIRD-PARTY-NOTICES file for licenses related to included third party libraries.
 
 ## Feedback
 
-Feedback to the Realm SDK's should be given in the respective SDK's github mentioned in the top of this readme. Anything else about the Realm Core, please create an [issue here](https://github.com/realm/realm-core/issues/new).
+Feedback to the Realm SDK's should be given in the respective SDK's github mentioned in the top of this readme.
+For anything specifically about Realm Core, please create an [issue here](https://github.com/realm/realm-core/issues/new).
 
 <img style="width: 0px; height: 0px;" src="https://3eaz4mshcd.execute-api.us-east-1.amazonaws.com/prod?s=https://github.com/realm/realm-core#README.md">

THIRD-PARTY-NOTICES

@@ -2,14 +2,14 @@ Realm/MongoDB uses third-party libraries or other resources that may
 be distributed under licenses different than the Realm software.
 
 In the event that we accidentally failed to list a required notice,
-please bring it to our attention through any of the ways detailed here :
+please bring it to our attention through any of the ways detailed here:
 
            [email protected]
 
 The attached notices are provided for information only.
 
-For any licenses that require disclosure of source, sources are available at
-https://github.com/realm/realm-core/src/external.
+For any licenses that require disclosure of source, sources are available in the
+realm-core/src/external/ directory
 
 
 1) License Notice for IntelRDFPMathLib20U2
@@ -18,28 +18,28 @@ Copyright (c) 2018, Intel Corp.
 
 All rights reserved.
 
-Redistribution and use in source and binary forms, with or without modification, 
+Redistribution and use in source and binary forms, with or without modification,
 are permitted provided that the following conditions are met:
 
    * Redistributions of source code must retain the above copyright notice, this
      list of conditions and the following disclaimer.
-   * Redistributions in binary form must reproduce the above copyright notice, 
-     his list of conditions and the following disclaimer in the documentation 
+   * Redistributions in binary form must reproduce the above copyright notice,
+     his list of conditions and the following disclaimer in the documentation
      and/or other materials provided with the distribution.
-   * Neither the name of Intel Corporation nor the names of its contributors 
-     may be used to endorse or promote products derived from this software 
+   * Neither the name of Intel Corporation nor the names of its contributors
+     may be used to endorse or promote products derived from this software
      without specific prior written permission.
 
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT OWNER OR CONTRIBUTORS 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 
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT OWNER OR CONTRIBUTORS 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.
 
 
@@ -82,3 +82,58 @@ DO NOT RELY ON FEATURES THAT ARE NOT DOCUMENTED in the manual,
 especially those whose name start with YY_ or yy_.  They are
 private implementation details that can be changed or removed.
 
+
+3) License Notice for JSON for Modern C++
+---------------------------------------------
+
+MIT License
+
+Copyright (c) 2013-2019 Niels Lohmann <http://nlohmann.me>.
+
+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.
+
+
+4) License for MPark.Variant
+---------------------------------------------
+
+Copyright Michael Park, 2015-2017
+
+Boost Software License - Version 1.0 - August 17th, 2003
+
+Permission is hereby granted, free of charge, to any person or organization
+obtaining a copy of the software and accompanying documentation covered by
+this license (the "Software") to use, reproduce, display, distribute,
+execute, and transmit the Software, and to prepare derivative works of the
+Software, and to permit third-parties to whom the Software is furnished to
+do so, all subject to the following:
+
+The copyright notices in the Software and this entire statement, including
+the above license grant, this restriction and the following disclaimer,
+must be included in all copies of the Software, in whole or in part, and
+all derivative works of the Software, unless such copies or derivative
+works are solely in the form of machine-executable object code generated by
+a source language processor.
+
+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, TITLE AND NON-INFRINGEMENT. IN NO EVENT
+SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
+FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.