Light media player

Super light weight jquery player !!!

Upload control - Jquery + ASP.NET

clean and simple upload control for asp.net + jquery, this is not using form posting and using json to post data over to asp.net

this is using form posting which is not very useful, another framework which did form posting 

Many more for form posting
Link 1
Link 2

loading User control

Reference

Someone builds a project on this

Similar concept but this is lazy loading
The problem with this is that, you won't be able to leverage on the server control that you have.

This is a big problem if you are looking at async postback, because you cannot have full control on the control name generated.

Jquery control 101

Super control 1

Jquery UI developer portal

accordion

good example for accordion effect (expansion)

Good ui guy

Drag-And-Drop item sorter

Hierarchy sorter more description, very good control

Clean slider

You can get tons of slider in jquery, but most are confusing and hard to make changes.

This one is quite clean and easy to use, and it is able to hide the next and prev button whenever it is not necessary.

This slider is used for generating the content in the slider page.