via 22 Handy HTML5 & CSS3 Tools, Resources And Guides | Graphic and Web Design Blog.
Ask the select[or]racle
This is a nice tool, which translates you CSS selector syntax: selectorracle. The site says:
Ever wondered what a particularly complex CSS selector really means? Here’s your chance to find out! Simply enter one or more semi-colon separated selectors or rulesets into the following “Direct Input” area, or provide the URL of a stylesheet in the “URL Input” area. Best of all, the SelectORacle will flag potential errors and other problems, and it won’t choke on any actual rules. You’ve always wanted to know what makes those line-noise posers tick– now you can.
Cheat Sheet Central
Find a very useful overview of numerous “cheat sheets” at Smashing Magazine’s website. CSS, XHTML, C# and Python are only a few languages which are covered here.
The Apache Cheat Sheet is quite useful:
or the Regular Expressions cheat sheet: 
the web developer’s handbook
Check out Vitaly Friedman’s “the web developer’s handbook“. It’s an awesome collection of very useful links to sites about CSS, DOM, AJAX, design etc.
Present your photos smoothly: Thickbox
ThickBox is a webpage UI dialog widget written in JavaScript on top of the jQuery library. Its function is to show a single image, multiple images, inline content, iframed content, or content served through AJAX in a hybrid modal.
Link: Thickbox 2.0
See also our Code Poetry post about JQuery.
qooxdoo, a powerul AJAX GUI Framework
qooxdoo is one of the most complete open source AJAX frameworks. It is an LGPL-licensed multipurpose framework that includes support for professional JavaScript development, a state-of-the-art GUI toolkit and high-level client-server communication.
Link: qooxdoo.org
Program AJAX Pages the WinForms way
I accidently ran into Visual WebGUI as I searched google for the words “AJAX and WinForms“. The concept is pleasing: just program application like you are used to when program WinForm applications. The author calls this technique the WOW model: WinForms Over The Web. The output is a web application which makes heavy use of AJAX and has a Windows look and feel. At the time of this writing, the framework only supports Internet Explorer. Code
Project offers two tutorials: Developing your first Visual WebGui application and Developing a Visual WebGui gateway.
Globfx’s Neoswiff follows a similar approach, but compiles Flash .swf Files, Client/Server logic has to be done “by hand”. With Visual WebGUI you can program Client/Server AJAX apps just using Visual Studio as design tool. When Firefox support comes, this is definately a technology to evaluate.
Flex Style Explorer
The Flex Style Explorer demonstrates the CSS capabilities of Adobe’s Flex 2 Framework.
Quite impressive.
Go to Flex Style Explorer.
CODE POETRY 