Logo slider

Hi,

I need a plugin for a client website that can be used to show a vertical image slider displaying logos of several companies (sponsors), and it is a must that is easy to add images to the slider (Since it is for a client). The front-end should look like this slider (Under Sponsors2012): https://www.primefinancedisputes.org/index.php/events/conferences.html

I have been looking for hours.. Anyone knows a good plugin which does this simple functions (It is okay if it is a premium plugin!)