Fusion is a free compositing program specifically for film and video-related special effects. It has a powerful node system with a fully integrated scripting system and traditional timeline. It is available for Windows, Linux, and Mac.Blackmagic Fusion Website
Fusion is an excellent tool for motion graphics and compositing. It’s primarily a node-based compositor, but also includes a timeline view for simple cuts and time-based manipulations. It also has a straightforward and powerful scripting system to allow automated tasks, or integration into custom workflows. The free version includes most crucial features, but lacks a few higher end tools, such as planar tracking and DCI 4K renders.