IntelliJ IDEA Plugins

Nobody can ever hope to build a development tool that is all things to all developers. IntelliJ IDEA is no exception (though many people tell us that it is most things to many Java developers!) Right now our Plugin Repository lists more than 500 plugins, both freeware and commercial.
Here are some of the free plugins, just to give you a taste of what's available:

Install Plugins Using IntelliJ IDEA Plugin Manager

IntelliJ IDEA provides integration with Plugin Repository. A convenient UI helps you install any available plugin from the Plugin Repository without leaving IntelliJ IDEA. (IDE Settings | Plugins).

The IntelliJ IDEA Plugin Manager also supports automatically updating installed plugins when new plugin versions are released.

See all plugins in the Plugin Repository at: http://plugins.intellij.net.

Information for Plugin Developers

Setting Up the Plugin Development Environment

The recommended way of setting up a plugin development environment for IntelliJ IDEA 9 is to check out the source code of IntelliJ IDEA Community Edition. The source code also includes a number of small sample plugins that you can use as a starting point for your development.

You can find the instructions for this at the jetbrains.org site.

Documentation

Get a general overview of how to create and publish a plugin for IntelliJ IDEA: Live demo

A number of articles describing different aspects of plugin development and the architecture of IntelliJ IDEA can be found in the IntelliJ IDEA Plugin Development page.

Additional Plugin Development Resources

You can discuss any issues related to the IntelliJ IDEA OpenAPI with the JetBrains team and other plugin developers in the corresponding discussion forum.

Once your plugin is ready, you can upload it to the IntelliJ IDEA Plugin Repository.