Download the free software from the GoPro site or just use windows movie maker or IMovie. No need to spend money but these are limited to basic editing but they will do the job. I've used most that are available but I like Sony Vegas Pro, easy to use and lots of online tutorials to teach you some tricks. Others will have a different opinion of what's best, just download trial versions from their websites and see which one you like best.....try before you buy!
