WGo.js also comes with powerfull go player, or more precisely sgf game viewer, which can be embedded into websites. This player is designed to be unlimitedly extendable.
WGo.js contains two main modules Board and Game.
Graphical go board implemented in HTML5 canvas. It has extensive API for easy manipulation. You can add and remove predefined objects like stones on board, you can create your own objects, or even make cut-outs of board.
Object for storing of game's position and controling game's flow. With method "play" you can play move and create new position with rules applied.
It is web viewer of Go games (SGF) built on top of the WGo.js library. You can easily put it into your website.