A free program for Android, by VideoVibe.

Video Speed Slow Motion & Fast is an application that lets you slow down or speed up the playback of your videos. It is a simple and intuitive application that is easy to use. You can use it on Android devices and iOS devices. The app is designed to work on videos that are stored on the device or uploaded to the server. You can select from a list of options that are available for you to choose from. It is a simple and easy-to-use application that lets you do all of this in a very easy and simple way.