Eclipse is an integrated development environment that targets developers who have to work with various programming languages and thus create software applications. The app has a tedious installation process, which does take several minutes to complete.
Once you start the application, you are welcomed by a modern interface, with side panels, a toolbar, the main menu, and a working area. The toolbar icons seem a bit too small and have no description. Also, the font could've been bigger. Apart from these, there aren't major inconveniences.
Eclipse integrates numerous, but, at the same time, complex features. Its comes with lots of Docker tools that can be used to work with Tomcat servers, node.js, or other technologies.
Moreover, it has an Automatic Error Reporting tool that sends the errros to eclipse.org the moment they're discovered. It also contains several graphic editors for easy development, and other tools and APIs to run, deploy, and test applications.
All in all, Eclipse provides users all the necessary tools needed to develop great applications. Yet, it has a steep learning curve, and it's recommended to be used only by skilled users.