Top Rated for IntelliJ IDEA

Presentation Assistant

This plugin shows name and Win/Mac shortcuts of any action you invoke (View | Descriptions of Actions).

Json Parser

Simple JSON Parser is an IntelliJ IDE plugin for validation and formatting JSON string.

Lines Sorter

Add Sort Lines action in Edit menu to sort selected lines or whole file if selection is empty.

SmartIntroduce

Tries to provide smart (and choosable) pre-selections for the different Introduce-... refactorings.

ADB Idea

Adds the following ADB commands to Android Studio and Intellij:.

Archive browser

This plugin allows you to browse zip and gzip archives like folders in IDEA.

AceJump-Lite

By eeemt
Press ALT + M (default hot key) to active AceJumpChar.

Focus on Active Task

Focuses the project tree view on the active task, only displaying relevant files/paths.