GoEN Sudoku Shortcuts

Board Game Arena (BGA) Chrome Extension - boardgamearena.com

bga-extension

Manage your games in progress, and add many visual enhancements (dark mode, etc.).

Chessconnect

Connect your electronic chessboard to Chess.com, Lichess, and more! The ultimate free extension for smart board owners

Nyan Cat

Nyan cat: the unfamous biscuit cat and his rainbow

Nyan Cat Progress Bar for YouTube™ (2025)

Justin

Replaces the YouTube progress bar with a Nyan Cat animation.

Ambient sound

Use Ambient Sound extension to enjoy tranquility with ambient noise. Enhance focus with white noise sound and ambient mixer.

Lichess Custom Themes, Boards - LichessHelper

2026 Setup new themes, pieces, fonts, and boards, remove annoying notifications, popups, and so on.

GPThemes - ChatGPT Customization & Tweaks

itsmarta

Redesign ChatGPT: custom colors, fonts & layouts — widescreen mode, width sliders, expandable chatbox, hide header/footer & more.