video editing software

The professional versions include Adobe Premiere Pro CC, Avid Media Composer, grass valley EDIUS Pro 7, Final Cut Pro X (Mac only).Sony Vegas Pro, Lightworks, etc.
Non-pro version include Adobe Premiere Elements, Sony Movie Studio, Corel VideoStudio Pro, CyberLink PowerDirector, Pinnacle Studio, and many others.
 
If your not looking to spend any money and you are on windows 7+ then try windows movie maker, its simple and basic and easy to use if your not looking to do extreme stuff.