wp-cycle for posts (text), not images?

Site is here: https://eco-modernism.com

The ‘Testimonials’ block at middle right side is a widget. I’d like to have it rotate individual testimonials.

It can do so either on each page load, or to cycle through them the same way the Wp-Cycle plugin works in my main image area on the homepage.

Is there such a plugin as Wp-cycle but for posts I could tag or categorize somehow as ‘testimonials’?

I don’t want the testimonial entries to show up as blog posts, just to shuffle through them in the Testimonial widget on the front page.