Top Rated for IntelliJ IDEA Community Edition

SmartIntroduce

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

Android ButterKnife Zelezny

By avast
Plugin for generating ButterKnife injections from selected layout XMLs in activities/fragments/adapters.

Scroll From Source

Set the keyboard shortcut to the function of "Scroll From Source" in Project Panel.

Main Menu toggler

Main Menu visibility toggler for IDEs based on the IntelliJ platform.

EmmyLua

Support for Lua programming language.

Save Actions

Supports configurable, Eclipse like, save actions, including "organize imports", "reformat code", "rearrange code", "compile file" and some quick fixes for Java like...

ToolWindow Manager

Allows availability of IDEA ToolWindow buttons to be controlled on a per-project basis.

Non Project Files Unlocker

By meo
Disables annoying dialog for unlocking non-project files - IDEA-125379.

Env File

Env File Compiled with Java 1.6 GitHub | Issues Env File is a plugin for JetBrains IDEs that allows you to set environment variables for your run configurations...