This plugin will display testimonials in sidebar with several effects. You can manage the options from backend.Also you can use Shortcode for pages.
FP Testimonials allows you to create testimonials and display the associated testimonials on your sidebar using widgets. The sliding options are managable from wordpress admin area. You can use shortcode ([textimonial limit=5]) for showing in page, here 5 is for example, you can place yours, if you don't want to place limit then just place [testimonial], it will display 10 posts by default.
You can control over your testimonial sliding transion effect, time, direction etc.
** Pagination is available when you use shortcode. ** Client image can be added now.