Maim

From Bitpost wiki

I'm using maim + slop to get REALLY nice and fast screen captures via PrtScrn key in i3. When I grow up I wanna be Taylor! love you buddy...

But Ubuntu's 17.10 maim package is busted. Compile it!

sudo apt install libjpeg-dev libxcomposite-dev libxrandr-dev libglm-dev
cd ~/apps && git clone https://github.com/naelstrof/maim.git
cd maim
cmake -DCMAKE_INSTALL_PREFIX="/usr" ./
make && sudo make install