Cardboard

Modding api

Modding api that can be @required in userscript header (no install neccecary)

Recommended
Basic Achievements

Adds some basic achievements

Recommended
BetterChat

Improved chat bubbles

Critterguration

Settings API that shows each mod's settings in its own tab

Ctrl Panel

Button api

Recommended
Non-mouse Movement

Move with keyboard or controller

Recommended
Better Inventory

More items on inventory pages, resizable critter, and sorting

Recommended
Big screen

Game fills entire screen

BCMacro API

Adds an API that lets mods create specific actions that can be bound to buttons or keys.

Recommended
Hi-Res

Fixes blurriness

Antenna

3D Web-based peer to peer voice chat

Shop ease

Makes shop/chat log opening and closing look nicer

Private Box

Private server

Recommended
Box Critters Texture Pack Manager

This extention lets you easily switch between different themes, add new themes and create new themes.