I happened across this list of the 18 Best Open Source Tools for 2014, and thought you might find something of use in there. Of particular interest for this audience, take a peek at ShareX, "an open source program that lets you take screenshots or screencasts of any selected area with a single key, save them in your clipboard, hard disk or instantly upload them to over 30 different file hosting services. In addition to taking screenshots, it can upload images, text files and all other different file types."
Hint: click on the images in each post to go to the site in question.