Main site

• Stack Overflow Extras by ᔕᖺᘎᕊ

  Adds a whole lot of extra functionality and options to Stack Exchange. Full list here

• Sidebar comments by Normal Human

  Displays recent comments in the sidebar.

• AutoReviewComments by Benjol

  Lets you keep lists of prefill comments to use.

• Freehand Circles Drawing Tool by ᔕᖺᘎᕊ

  Red circles! Drawing stuff!

• Threaded comments by balpha

  Threads comments so you can see the logical flow better.

Review

• Review+ Page by Normal Human

  Moves review items to the sidebar for better clarity and displays a list of potentially VLQ or problem questions.

• Review Stalker Reloaded by Nathan Tuggy

  Lets you keep one tab of /review open that jumps around to all the other sites that you can review on.

• Audit Detector by Normal Human

  Shows you when you're getting audited.

Chat

• Porkchat by Fredley

  Chat plugin containing Dark Theme, Keyboard Shortcuts and Rebecca Black + Image protection

• Star Image Unthumbnailer by Madara Uchiha

  Unthumbnails images in the star wall

• Chatception by KeyboardFire

  Lets you chat on multiple chat rooms from one room.

• Sevichat by KeyboardFire

  Adds Vi-like commands to chat

• SE Chat Modifications by Tim Stone

  Adds / like commands to chat

• SE Chat Oneboxer by Quill

  Oneboxes a variety of links, like Instagram, Coding Horror, GitHub.

• Memer by Ismael Miguel

  Provides a tooltip for terminology specific to sites

• Badge Oneboxer by Quill

  Oneboxes [badge:whatever] like the tag oneboxes.

Site specific

PPCG

• Site design by vihanb

  Redesign of the PPCG site with some added functionality.

• Sandbox Viewer by vihanb

  Lets you view the new "Sandbox for Proposed Questions" proposals in a nice interface and from any page in the site.