depends on your operating system possibly? We use imovie as I and our mate who shoots video both have macs (actually he uses Final cut Pro). Imovie is free for macs and is a great simple to use piece of kit. If you're windows based, I'm not so sure, Adobe Premier Pro is the biggie but it's expensive. There's Adobe Premiere elements which is about £90. Depends on how detailed you want to go and how much you want to spend..me..nothing!