Unreal Engine 4
Slow Time exposes the Slow Time Component, which can be attached to any actor and provide control of time dilation when other actors overlap it.
The plugin also exposes the Slow Time Volume (which uses Slow Time Component) and provides volume-based slow-time (or fast-time) effect for actors entering/leaving it. When an actor defined in the configuration enters the volume, time dilation will be altered accordingly and will return to its original value when actor leaves the volume.
Despite it's name, the assets provided with the plugin can be used to speed-up time as well. Can be used to create slow-time bubbles, slow-time volume-based areas, time jumps etc.
Unreal Marketplace link: Slow Time