add note about OSS free license for JetBrains products

basics/getting_started/plugin_compatibility.md

@@ -18,6 +18,8 @@ Some of these products share features built on top of the platform, such as Java
 Underlying those shared features are shared components. 
 When authoring a plugin for the IntelliJ Platform, it is important to understand and declare dependencies on these components. 
 Otherwise, it may not be possible to load or run the plugin in a product because the components on which it depends aren't available.
+                                   
+> **TIP** Qualifying Open Source projects can [apply for free licenses](https://www.jetbrains.com/community/opensource/) of JetBrains products.
 
 * bullet list
 {:toc}

intro/intellij_platform.md

@@ -40,6 +40,8 @@ Typically, an IDE that is based on the IntelliJ Platform will include the `intel
 The IntelliJ Platform underlies many JetBrains IDEs. 
 IntelliJ IDEA Ultimate is a superset of the IntelliJ IDEA Community Edition but includes closed source plugins ([see this feature comparison](https://www.jetbrains.com/idea/features/editions_comparison_matrix.html)). Similarly, other products such as WebStorm and DataGrip are based on the IntelliJ IDEA Community Edition, but with a different set of plugins included and excluding other default plugins.
 This allows plugins to target multiple products, as each product will include base functionality and a selection of plugins from the IntelliJ IDEA Community Edition repository.
+                    
+> **TIP** Qualifying Open Source projects can [apply for free licenses](https://www.jetbrains.com/community/opensource/) of JetBrains products.
 
 The following IDEs are based on the IntelliJ Platform:
 * JetBrains IDEs

products/app_code.md

@@ -6,6 +6,8 @@ title: AppCode Plugin Development
 ## Introduction
 Plugin projects targeting [AppCode](https://www.jetbrains.com/objc/) can be developed using IntelliJ IDEA with the `gradle-intellij-plugin`.
 
+> **TIP** Qualifying Open Source projects can [apply for free licenses](https://www.jetbrains.com/community/opensource/) of JetBrains products.
+
 ## Configuring Plugin Projects Targeting AppCode
 The Gradle configuration of AppCode plugin projects uses neither Product-Specific nor IntelliJ IDEA Attributes.
 Instead, configure AppCode plugin projects to use the `intellij.localPath` attribute.

products/clion.md

@@ -7,6 +7,8 @@ title: CLion Plugin Development
 [CLion](https://www.jetbrains.com/clion/) is an IntelliJ Platform-based product.
 Plugin projects for CLion can be developed using IntelliJ IDEA with the `gradle-intellij-plugin`.
 
+> **TIP** Qualifying Open Source projects can [apply for free licenses](https://www.jetbrains.com/community/opensource/) of JetBrains products.
+
 ## Configuring Plugin Projects Targeting CLion
 The configuration of CLion plugin projects follows the methods described in [Configuring Plugin Projects using a Product-Specific Attribute](dev_alternate_products.md#configuring-plugin-projects-using-a-product-specific-attribute), and [Configuring the plugin.xml File](dev_alternate_products.md#configuring-pluginxml).
 

products/data_grip.md

@@ -7,6 +7,8 @@ title: DataGrip Plugin Development
 [DataGrip](https://www.jetbrains.com/datagrip/) is an IntelliJ Platform-based product.
 Plugin projects targeting DataGrip can be developed using IntelliJ IDEA with the `gradle-intellij-plugin`.
 
+> **TIP** Qualifying Open Source projects can [apply for free licenses](https://www.jetbrains.com/community/opensource/) of JetBrains products.
+
 ## Configuring Plugin Projects Targeting DataGrip
 The configuration of DataGrip plugin projects follows the methods described in [Configuring Plugin Projects using the IntelliJ IDEA Product Attribute](dev_alternate_products.md#configuring-plugin-projects-using-the-intellij-idea-product-attribute), and [Configuring the plugin.xml File](dev_alternate_products.md#configuring-pluginxml).
 

products/dev_alternate_products.md

@@ -12,6 +12,8 @@ Project configuration attributes common to projects targeting products other tha
 Details particular to an IntelliJ Platform-based product are described on the individual product pages in Part VIII.
 All of the Gradle configuration attributes described here are discussed in-depth on the [Configuring Gradle for IntelliJ Platform Plugins](/tutorials/build_system/gradle_guide.md) and the `gradle-intellij-plugin` [README](https://github.com/JetBrains/gradle-intellij-plugin/blob/master/README.md) pages.
 
+> **TIP** Qualifying Open Source projects can [apply for free licenses](https://www.jetbrains.com/community/opensource/) of JetBrains products.
+
 * bullet list
 {:toc}
 

products/goland.md

@@ -7,6 +7,8 @@ title: GoLand Plugin Development
 [GoLand](https://www.jetbrains.com/go/) is an IntelliJ Platform-based product.
 Plugin projects for GoLand can be developed using IntelliJ IDEA with the `gradle-intellij-plugin`.
 
+> **TIP** Qualifying Open Source projects can [apply for free licenses](https://www.jetbrains.com/community/opensource/) of JetBrains products.
+
 ## Configuring Plugin Projects Targeting GoLand
 The configuration of GoLand plugin projects follows the methods described in [Configuring Plugin Projects using the IntelliJ IDEA Product Attribute](dev_alternate_products.md#configuring-plugin-projects-using-the-intellij-idea-product-attribute), and [Configuring the plugin.xml File](dev_alternate_products.md#configuring-pluginxml).
 

products/idea.md

@@ -3,5 +3,7 @@ title: IntelliJ IDEA
 ---
 <!-- Copyright 2000-2020 JetBrains s.r.o. and other contributors. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file. -->
 
+> **TIP** Qualifying Open Source projects can [apply for free licenses](https://www.jetbrains.com/community/opensource/) of JetBrains products.
+
 * [Tomcat Integration](../reference_guide/tomcat_integration.md)
 * [Spring API](../reference_guide/frameworks_and_external_apis/spring_api.md)

products/pycharm.md

@@ -7,6 +7,8 @@ title: PyCharm Plugin Development
 [PyCharm](https://www.jetbrains.com/pycharm/) is an IntelliJ Platform-based product.
 Plugin projects for PyCharm can be developed using IntelliJ IDEA with the `gradle-intellij-plugin`.
 
+> **TIP** Qualifying Open Source projects can [apply for free licenses](https://www.jetbrains.com/community/opensource/) of JetBrains products.
+
 ## Configuring Plugin Projects Targeting PyCharm
 The configuration of PyCharm plugin projects follows the methods described in [Configuring Plugin Projects using a Product-Specific Attribute](dev_alternate_products.md#configuring-plugin-projects-using-a-product-specific-attribute), and [Configuring the plugin.xml File](dev_alternate_products.md#configuring-pluginxml).
 The table below summarizes the `gradle-intellij-plugin` attributes to set in the `build.gradle` file.

products/rider.md

@@ -8,6 +8,8 @@ Rider plugins are generally used to expose the functionality of a ReSharper plug
 [Rider](https://www.jetbrains.com/rider/) uses the IntelliJ Platform somewhat [differently](/intro/intellij_platform.md#rider) than other Platform-based based IDEs. 
 Rider uses the IntelliJ Platform to provide the user interface for a C# and .NET IDE but uses ReSharper to provide the language-specific features.
 
+> **TIP** Qualifying Open Source projects can [apply for free licenses](https://www.jetbrains.com/community/opensource/) of JetBrains products.
+
 ## IntelliJ IDEA Configuration for Rider Plugin Development
 Although there is no dedicated Rider SDK, the [ReSharper DevGuide](https://www.jetbrains.com/help/resharper/sdk/Products/Rider.html)  addresses the subject of plugins for Rider. 
 The documentation describes the [configuration](https://www.jetbrains.com/help/resharper/sdk/Products/Rider.html#plugin-project-jvm) of `build.gradle` and `settings.gradle` files to build a Rider plugin using the [Gradle project system](/tutorials/build_system.md) in IntelliJ IDEA.

products/rubymine.md

@@ -7,6 +7,8 @@ title: RubyMine Plugin Development
 [RubyMine](https://www.jetbrains.com/ruby/) is an IntelliJ Platform-based product.
 Plugin projects for RubyMine can be developed using IntelliJ IDEA with the `gradle-intellij-plugin`.
 
+> **TIP** Qualifying Open Source projects can [apply for free licenses](https://www.jetbrains.com/community/opensource/) of JetBrains products.
+
 ## Configuring Plugin Projects Targeting RubyMine
 The configuration of RubyMine plugin projects follows the methods described in [Configuring Plugin Projects using the IntelliJ IDEA Product Attribute](dev_alternate_products.md#configuring-plugin-projects-using-the-intellij-idea-product-attribute), and [Configuring the plugin.xml File](dev_alternate_products.md#configuring-pluginxml).
 

products/webstorm.md

@@ -7,6 +7,8 @@ title: WebStorm Plugin Development
 [WebStorm](https://www.jetbrains.com/webstorm/) is an IntelliJ Platform-based product.
 Plugin projects for WebStorm can be developed using IntelliJ IDEA with the `gradle-intellij-plugin`.
 
+> **TIP** Qualifying Open Source projects can [apply for free licenses](https://www.jetbrains.com/community/opensource/) of JetBrains products.
+
 ## Configuring Plugin Projects Targeting WebStorm
 The configuration of WebStorm plugin projects follows the methods described in [Configuring Plugin Projects using the IntelliJ IDEA Product Attribute](dev_alternate_products.md#configuring-plugin-projects-using-the-intellij-idea-product-attribute) and [Configuring the plugin.xml File](dev_alternate_products.md#configuring-pluginxml) for PhpStorm.