I have created Snappshot, a new webapp to help market your apps.
I recently came across Placeit, a webapp that allows you to overlay screenshots of your app onto a picture of devices in use. I tried it for awhile, and while many of the photos were nice, a lot of the resolutions or placements were off. It was frustrating that I couldn’t fix the placement myself, so I set off to create an alternative, one that makes it easy for someone to fix the dimensions or placement of screenshots if they were added incorrectly.
I initially created a script to place in screenshots using ImageMagick, but decided that to make this most accessible, I would need to make a webapp as well. I converted the scripts to python and used PIL for image manipulation and Django for the web framework.
You can check it out on Github.