Zwei-Stein
Zwei-Stein might seem like the last name of a person, but instead it's actually a reliable and highly functional free video editing program. The program works great in editing but does feature a very technical interface so it's ideal for someone who doesn't get easily daunted by the onslaught of various windows and buttons in one screen.
The program makes it easy for users to incorporate special effects to their videos and can easily work on two different media sources and render them at the same time. These are just two of the software's strengths. Pretty much, Zwei-Stein has plenty more up its sleeve when it comes to helping users with their video/image editing needs.