Use Cases and Deployment Scope
OmniGraffle has tons of uses, not least of which is as an image and graphic design tool. Not needing major graphic design software in-house (we outsource that work when it's needed) we use OmniGraffle to design graphics and images as needed. We also use it to work with vector images and stencils in order to create details for construction documents as needed. OmniGraffle just has so many fantastic uses, probably many of which we haven't even begun to utilize to the fullest.
Other Software Used
Project.co, Getscreen.me, Vectera