VideoProc - VideoProc is an easy video processing software to convert 4K UHD videos, DVDs and music with full GPU acceleration; resize, cut, crop, merge, adjust, compress; download videos/music/playlists, record screen in 3 ways.
Audio Hero - Over 250,000 royalty free music & sound effects for videos
HandBrake - HandBrake allows users to easily convert video files into a wide variety of different formats.
TunePocket - Download 11,000+ royalty free music tracks and sound FX. Buy once, use forever. New music added daily. Save over 50% compared to most popular similar services. Incredible value!
OpenShot - OpenShot is a open source video editing program.
Free Music Archive - Interactive library of high-quality, legal audio downloads