OpenShot Video Editor is a non-linear video editor. It is meant to be an easy-to-use, powerful, non-linear video editor, with a focus on user interface, work flow, and stability.
StrSync synchronizes subtitles with a movie. It's useful, for example, when the subtitles were made for the same movie title, but for a different "rip". You just need to give a subtitle file in SRT format and the times in the movie where the first and last subtitles should be.