# About Icinga 2 <a id="about-icinga2"></a> ## What is Icinga 2? <a id="what-is-icinga2"></a> Icinga 2 is an open source monitoring system which checks the availability of your network resources, notifies users of outages and generates performance data for reporting. Scalable and extensible, Icinga 2 can monitor large, complex environments across multiple locations. ## Licensing <a id="licensing"></a> Icinga 2 and the Icinga 2 documentation are licensed under the terms of the GNU General Public License Version 2. You will find a copy of this license in the LICENSE file included in the source package. ## Support <a id="support"></a> Check the project website at [icinga.com](https://icinga.com) for status updates. Join the [community channels](https://icinga.com/community/) for questions or ask an Icinga partner for [professional support](https://icinga.com/services/support/). ## Contribute <a id="contribute"></a> There are many ways to contribute to Icinga -- whether it be sending patches, testing, reporting bugs or reviewing and updating the documentation. Every contribution is appreciated! Please continue reading in the [Contributing chapter](https://github.com/Icinga/icinga2/blob/master/CONTRIBUTING.md). ### Icinga 2 Development <a id="development-info"></a> The Git repository is located on [GitHub](https://github.com/Icinga/icinga2). Icinga 2 is written in C++ and can be built on Linux/Unix and Windows. Read more about development builds in the [development chapter](21-development.md#development). ## What's New <a id="whats-new"></a> The Icinga 2 Changelog is located [here](https://github.com/Icinga/icinga2/blob/master/CHANGELOG.md). Please follow our release announcements on [icinga.com](https://icinga.com/blog/) too.