Make sure you have the latest software in you GoPro's, I didn't and it would stop filming randomly between 10 seconds to 90 seconds in. Very annoying, but it's an easy and FREE fix from GoPro. As for software, I use the windows 8 included Cyberlink power director, basic stuff but does what I want. For timelapses I downloaded this free program called VirtualDub. There's a few how-to's online, I used  this one.