Last year I developed and released an image slider add-on for osCommerce which used Easy Slider as image slider.
It turned out to be very useful add-on for community and I have removed few bugs since then. Many users asked for features such as multi-lingual support in the slider, Nivo Slider jQuery plugin as front end slider. I have combined all the feature requests into new version of the Slider, but this not a free add-on.
This osCommerce-Slider add-on will add a slideshow in your osCommerce 2.3.1 store and will add a section inside your osCommerce Admin panel under Catalog > Slideshow to manage and add slides. It will also add slider configuration panel under Configuration>Slideshow. Slider configuration panel allows you to set several parameters of Nivo Slider from the admin panel.