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For info on thousands of Unicode Standards characters, visit Unicode.org. In the Unicode Character charts you’ll find scripts and symbols as PDF downloads.

You may need to look in several locations to find your character: “Punctuation and symbols are applicable across a very wide range of usages and scripts (writing systems). Even the notion of a script itself is not well-defined; text in a given language may make use of characters from multiple scripts. For example, the digits 0-9 are in widespread use; the Devanagari danda is used across many Indic scripts.”

This is not a comprehensive how-to guide, but rather a collection of some useful tips when you’re just starting out programming PHP based websites. The short tutorial on PHP Builder offers tips on debugging, how to deal with magic quotes and the MySQL connection class for example.

Sometimes you need to look up a file type by category to find out its extension and File-Extensions.org is the perfect site for that. The site will list the most popular file types within a category to save you some time when browsing through it. Some categories contain hundreds of extensions which are listed alphabetically.

The list of file extensions at FileExt.com comes in handy when you’re working with any kind of data, but especially client files and you need to find out which program created them, or can at least read them. Simply enter the file extension in the search box (file extension only; no other words), or search alphabetically. FileExt.com currently has over 51,000 registered filetype records in their database. To make searches easier, you can add a FileExt search box to Firefox, or add a button to the Google toolbar. This site is a great resource for anyone working with websites, or any kind of data.

For a tutorial about creating a simple Ajax contact form, visit QD-Creative. It clearly explains the html, CSS, PHP Script and Ajax to use and includes a demo.

Cheat sheets are a great way to get all the important information about IT topics like language or technology on just one page to quickly refresh your memory when you need to. Cheat sheets present a topic at a glance and avoid you having to spend time combing through search engine results. A great collection of cheat sheets is at CheatSheets.org. Each cheat sheet presents info in html, pdf or other formats and includes an official website URL for more info.

There are sections for beginners and advanced users, reference guide, shell programming etc. at this UNIX resource at Tutorialspoint.com.

Use this free site to ask questions, or help someone else with theirs. StackOverflow has a simple interface and is useful when you search for specific answers and interesting to browse.

Must be one of the best Photoshop tutorials out there. Site includes lots of how-to information and examples for using Adobe Photoshop, from drawing Poker chips to Creating Typographic Wallpaper.

Learn HTML, PHP, CSS, Learn TCP/IP, XML, DHTML, AJAX, SQL< ASP.NET, Flash, browser scripting or anything else web related with excellent, to-the-point and free tutorials at W3Schools.com.