OpenShot is a free open source video editing suite. It is an easy to use software that is very useful for editing and comparing recorded paranormal videos. I personally have tried many of the video editing softwares out there and find OpenShot the best one so far.
Audacity is a powerful, free, open source cross platform, audio software. Audio analysis of recorded sounds gathers by EVP recorders is an essential piece of paranormal research. Audio software allows you to get both a visual representation and the ability to enhance sections of audio for better analysis.
Click here to get Audacity.