Ultra–Lean HTML5, CSS, & JS Building Blocks for Rapid Website Production
Patternizer is an easy to use stripe pattern generator. It’s lots of fun and free!
font dragr allows you to easily test custom fonts, through the @font-face at-rule, without the need for any CSS coding or knowledge of CSS coding. All you need to do is drag and drop.
It is based on the principle of using the background-position property to align areas of a sprite image into block elements on a webpage, reducing server requests and improving organisation.
Typekit is a service which allows subscribers to embed fonts into online documents. It allows designers and developers a subscription-based library of hosted, high-quality fonts to use on their websites.
Online 3D Sketch Tool
A 3D software tool that combines a tool-set with an intelligent drawing system.
The HTML5 Test
The HTML5 test score is an indication of how well your browser supports the upcoming HTML5 standard and related specifications
Moqups is a nifty HTML5 App used to create wireframes, mockups or UI concepts, prototypes depending on how you like to call them.
Stitches is an HTML5 sprite sheet generator
SproutCore is an open-source framework for building blazingly fast, innovative user experiences on the web.
Less Framework 4
Less Framework is a CSS grid system for designing adaptive websites. It contains 4 layouts and 3 sets of typography presets, all based on a single grid.
Another awesome tools for web developers to create animations of HTML5, CSS3
The Heartcode CanvasLoader Creator is a free online tool which you can use to generate scripted preloaders (spinners or throbblers) for your HTML projects.
On/Off Flipswitch HTML5/CSS3 Generator
Generate pure CSS3 On/Off flipswitches with animated transitions.
Adobe Edge Animate
Create animated, interactive content for the modern web.
Initializr is an HTML5 templates generator to help you getting started with a new project based on HTML5 Boilerplate. It generates for you a clean customizable template with just what you need to start!
LimeJS is a HTML5 game framework for building fast, native-experience games for all modern touchscreens and
Create.js is a comprehensive web editing interface for Content Management Systems. It is designed to provide a modern, fully browser-based HTML5 environment for managing content. Create can be adapted to work on almost any content management backend.
Sleek, intuitive, and powerful front-end framework for faster and easier web development.
The most advanced responsive front-end framework in the world.
Skeleton is a small collection of CSS files that can help you rapidly develop sites that look beautiful at any size, be it a 17″ laptop screen or an iPhone.