GoPro Studio is free and covers most requirements including fisheye removal. Wondershare Filmora gives you zoom in and out with pan effect, and the are constantly updating their system. Mind you, it all depends on your requirements. I find I spend more time editing and planning a shoot, than actual flying time. Then again I divide my work up with mobile work with a handheld grip mounted on the car, nature close up's of local bird life. Gulls & Crows. So divide up your time, it's surprising what you will learn.