Support for most input media formats including video, image and audio. This is a program that is really tailored towards beginners. A view of the UI elements that are found within the program could use a bit of work and the controls are somewhat limited for effects. It has a good user interface and many effects. Openshot is an open source video editor, which allows you to chroma keying of green screen videos. These effects include chroma key compositing and 3d effects. Wax is a simple video editor which provides lots of special effects which enables users to produce dynamic pieces of video.
It also includes a basic green screen option, but it is not very powerful compared to other software. It helps you deal with the basic video editing like swap audio tracks, add filters, trim clips and adjust audio. VirtualDub is free video editing and green screen software designed for fast processing and versatility. Here is a detailed guide on how to apply green screen effect. Besides of basic functions, it provides a simplistic timeline, built-in sound and animations and various easy-to-use effects including green screen effect.
You can download this green screen software for windows. It comes with a variety of options for chroma keying green screen videos and various color-related options to add more effects to the video. It gives you more controls for chroma keying.