Scala plugin for IntelliJ IDEA
[NOT ACTIVELY MAINTAINED, use https://www.jetbrains.com/go/ or https://plugins.jetbrains.com/plugin/9568-go] Google Go language plugin for the Intellij Platform
Lombok Plugin for IntelliJ IDEA
Saros Plugin Development
IntelliJ Plugin for Ceylon
This will be the home of the newly merged sonar-intellij-plugin - THE IntelliJ IDEA plugin to connect to your SonarQube instance.
https://github.com/camel-tooling
Vala language support plugin for Intellij
Markdown language support for IntelliJ IDEA.
Intellij Plugin for the D Programming Language
IntelliJ IDEA plugin for Haskell
SBT support plugin for Intellij IDEA via sbt-remote-control
Behaviour Driven Development plugin for IntelliJ IDEA