If you are looking for free resources to learn Ajax, PHP, CSS and JavaScript take a look at this collection with six interesting online presentations about these topics. The list includes a short introduction to Ajax, how to write modular CSS code, PHP Object Model fundamentals and an overview about the most popular JavaScript libraries.
1. Ajax 101 | Workshop
Author: Bill Scott | This presentation on SlideShare
Introduction to programming with Ajax. Covers XMLHttpRequest, XML, JSON, JavaScript, HTML, CSS, Dom Scripting, Event Handling with some examples from YUI library.
2. Modular CSS
Author: Russ Weakley | This presentation on Slide Share
A clearly explained modular system that allows you to hide and show CSS rules to specific browsers without the need for extensive hacks or workarounds.
3. Understanding the PHP Object Model
Author: Sebastian Bergmann | This presentation on SlideShare
This talk will give an overview of PHP's object model, covering both basic OOP concepts such as interfaces, classes, and objects as well as PHP's “magic” interceptor methods.
5. jQuery in 15 minutes
Author: Simon | This presentation on SlideShare
A short introduction to jQuery in particular about functions, collections, grabbing values and chaining.
6. JavaScript Library Overview
Author: Jeresig | This presentation on SlideShare
An interesting Overview about the most popular JavaScript libraries (jquery, prototype, Scriptaculous...) for web designers.

Thanks for sharing. Really great resources!
and another great list, nice post ^^
Ajax 101 presentation is superb. Thanks for such a wonderful list.
This is treasure trove.You could do a weekly presentation roundup . [#idea]
Praveen
http://spraveenitpro.blogspot.com
Nice list, but where's number 4?
Looks great. I am eager to check them out.
Hmm.. And There is no.4 ?
Some of these look interesting. Especially the Ajax 101 and the jQuery in 15 minutes.
Added to my delicious and I'll read them later.
Thanks!
Great resources for presentations..I needed these most and I need to give presentations now and then..thanks
Good one.Thank u.
Great thanks for sharing!
hey!!! really cool stuff. Where is NUMBER 4 though?? ;)
Good slides. Thanks for sharing.
Thks For Sharing this List,But as Harry Asked Where is No 4,u forgot?i think so
I was looking for learning pHp and AJAX, so these videos area a treasure 4 me :)
You have a very nice blog!
And great posts... Subscribed via RSS.
Useful slides, bookmarking :D
Remember to post the 4th one
Fantastic resource, especially for developers who want to get a taste for a new technology to add to their arsenal.
Great Post! Thanks a lot!
We've already actually implemented most of what is seen here, but I must admit I did pick up a few helpful tips, especially with the modular CSS.
Already made a couple of clients extremely happy!
Thanks again.
LeoH
www.bizarredesigns.com
Really fantastic resource. Very useful for me. Keep like this…
The JQuery presentation is really very nice. Anyone who has javascript knowledge can quickly learn JQuery just from this. Thanks :-)
cool thanks for the resources.
This list will be very helpful for webmasters like me. There are so much to learn but I don't know where to learn it all with ease.
Thanks a lot! We've just started learning PHP in school after dealing with JavaScript and jQuery... I didn't realy get the JavaScript, so thanks for this! ;-)
Now I'm going to do better on my exams =D
As a website owner, this can be helpful to be. Thank you for sharing these with me. Hope to get more useful tips and tutorial from your blog in future.