Roguelike Browser Boilerplate
This boilerplate project has everything you need to get a head start on making browser based, graphical tileset roguelikes using JavaScript, CSS, and HTML. You can use this instead of wading through the rot.js tutorials and documentation yourself. The groundwork is already laid with an integrated graphics tileset, title screens, menus, touch input, sound effects, mobile device testing, and the main gameplay components of a simple roguelike.
The boilerplate is a fully playable minimal graphical roguelike with source code. All you have to do is bring your imagination to make something unique.
There's also a series of screencasts showing you how to customize the boilerplate to make your own game.