Tabageos

Tabageos; Tads Basic Game Objects, is an open source Javascript library of Classes for making tile based html5 games.
You can make platformers, top down shooters, basic isometric games, rpgs, hack and slashers, generally any 2D game.
The code is designed to either do much for you, or allow you to piece things together yourself.
There are many code examples to learn from and documentation also available.
Some games made with it so far are Robot Street Obliteration and Subsist Baddies.

First series of video tutorials are online;