Hey guys, I personally think its completely ridiculous for snagit to not be supported on Linux. How hard is it really? After some months of realizing these guys aren't going to port over to Linux, and looking at how terrible Ubuntu's defaults are, I started building my own. Here's all you need to build your own:
screenshot: xwd -root -out 0.xwd && convert 0.xwd 0.png
screen record: avconv -f x11grab -s 1440x900 -r 25 -qp 0 -b 4000k -i :0.0 -c:v libx264 -pre:v libx264-veryfast -s 960x600 -y /home/jbud/Videos/0.avi
want to select region? use xrectsel
show the region you're recording? -show_region 1
follow your mouse? -follow_mouse centered
notification of screenshot/recording: notify-send 'screenshot' 'snapped a shot'
My scripts are under development still, if you're interested in getting the end result send me a message in a few weeks or so and I'll be glad to share :)