OpenShot Video Editor is a free and versatile video editing program that can create and edit a number of different types of high definition video formats and apply different effects and transitions easily. It is a free and open source video production application that's professional, comprehensive, feature-rich, user friendly and well-designed.
Here are some screenshots to illustrate the features and user interface of this application:
Aegisub
Cakewalk
ocenaudio
Sofeh Music Studio
HitFilm Express