I found in internet one free task tracker. It is TaskFreak.
That bug tracker is easy to use and useful for small projects or small design studio.
You can get more information on official web site also you can try it (link demo)

That bug tracker use php, mysql and ajax.

of. web site | demo | Download multi user version 0.6

I like the script and i use it.

That simple image crop Java Script. The script use php and jQuery.

demo Java Script image Crop | download jqueryjcrop-095tar

The script is ajax news letter. It  can help people.

ajax_newsletter

1) Concept
2) web design
2) Programming (CMS frondend and backend, php, mysql)

link