We just published a free plugin called CountUp Animation. This allows you to animate a counting operation (up or down) in a text* element via a workflow action. In other words, it will increment or decrement a number at a specified pace. You can specify a start value, end value, duration, and a couple other parameters related to the animation/visual.
*This does work with some other element types, like inputs, but the behavior in those cases is not officially supported by this plugin.
Please email any bugs, questions, or suggestions to [email protected] or reply to this thread. Happy Bubbling!