Top Rated for PyCharm Professional

Dracula Theme

Dracula is a dark theme for many editors, terminals, syntax highlight and eg.

TabNine

All-language autocompleter — TabNine uses machine learning to help you write code faster.

Validation-File Comparison

Plugin on GitHub | Cronn GmbH Website.

Grammar-Kit

BNF Grammars and JFlex lexers editor.

IDEA Jetty Runner

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

Non Project Files Unlocker

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

Save Actions

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

Kubernetes

Support for editing Kubernetes resource files (versions 1.5 - 1.16).

Erlang

Erlang support for IntelliJ IDEA, RubyMine, WebStorm, etc.

FridayMario

The first plugin in the world to gamify development in IntelliJ IDEs.