Cyberlink PowerDirector 11 LE is being given away for free for the next 24 hours from Give Away of the Day (GAOTD). You must install this program within the next 24 hours. If you're clever though, you can find the way to bypass the time limit ;)
This program is one of the best video editors around. You can add video, pictures, music, sound, special effects, etc. It's quite simple to use, but you may want to look at youtube for a few examples.
Reviews are here.
http://www.pcmag.com/article2/0,2817,2372982,00.asp
http://video-editing-software-review.toptenreviews.com/ (note: this is for ver 12, but they raved about ver 11 too)
Q: Why are they giving this away?
A: It's a light version - it's missing a few tools and some templates… and version 12 is now out
Q: is it fully functional/is it useable?
A: Yes
"Does not support Blu-ray, 3D, AVCHD, MPEG-1, MPEG-2, MKV, FLV & 4K"