Top Rated for PyCharm Professional

TabSwitch

Open files/tabs switcher to quickly switch between tabs with less keystrokes than Recent Files.

Solarized Theme

Adds Solarized Dark and Light themes.

CamelCase

Switch easily between CamelCase, camelCase, snake_case and SNAKE_CASE.

Close Editor Tabs Left Right

IntelliJ plugin to close all open editor tabs to the left and right of your current one, includes actions and context menu items.

Scratch

Quickly opens temporary IntelliJ text editor tab.

Scroll From Source

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

GitLink

Provides shortcuts to open a file or commit in GitHub, Bitbucket, GitLab, Gitea, Gogs or GitBlit using the default browser.

Active Intellij Tab Highlighter

Active Tab Highlighter Plugin for IntelliJ family IDEs.

Changelist Organizer

By 4ch1m
Automatically organizes your modified files by moving them into predefined changelists.

Erlang

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