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.
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:
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.