Top Rated for PyCharm Educational Edition

Latte

Provides support for Latte – a template engine for PHP.

LivePlugin

This is a plugin for IntelliJ IDEs to write plugins at runtime without having to restart IDE.

Zero Width Characters locator

Inspired by this question on Stack Overflow - this plugin adds an inspection that prevents some hard to find bugs related to invisible zero width characters in source...

IDEA Jetty Runner

A plugin that allows you to quickly run Jetty from IntelliJ IDEA.

Scroll From Source

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

Perl

Camelcade plugin provides support for the following languages and frameworks.

Presentation Assistant

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

Android ButterKnife Zelezny

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

MayaCharm

Maya integration with run and debug configurations for Maya.