Many plugins are available for almost any task a developer may need to cover. Plugins are developed by Jetbrains themselves or by 3rd parties through the SDK available for writing them.

The documentation is exhaustive, easy to navigate and clearly worded.

Uses a fast indexing technique to provide contextual hints (auto-completion, available object members, import suggestions). On-the-fly code analysis to detect errors and propose refactorization.

Uses a fast indexing technique to provide contextual hints (auto-completion, available object members, import suggestions). On-the-fly code analysis to detect errors and propose refactorization.

There is a free community edition (open source) and an ultimate edition, which you can compare here.

The ultimate edition is available for free for one year for students but must be registered through an .edu e-mail account.

IDEA has a clean, intuitive interface with some customization available (such as the Darcula theme).

If any file was corrupted by the IDE you don't have to restart your project.

IDEA places an emphasis in safe refactoring, offering a variety of features to make this possible for a variety of languages. These features include safe delete, type migration and replacing method code duplicates.