It's a program that's a combination of a universal file sharer, screenshotter, image editor, screen recorder (which can output gif) and a seriously unbelievable suite of tools like OCR, image combiners, a QR generator, etc.

When I say universal file sharer, I mean everything. It uploads to different sites based on the filetype, be it drive for files, gifycat for .mp4's, pastebin for text, whatever. And there isn't a linux equivalent. Which sucks.