Lucidchart, Enterprise Architect, Axure RP, Balsamiq Wireframes, InVision, Principle, Presentator.io, Moqups, not8, Notable, Red Pen, Mockup.io, Threed.io, Quant-UX, Adobe Comp CC, mydraft.cc, Visualtip, Wireflow, proofHQ, Apache OpenOffice Draw, Framebench, Pangolin, Devhand SketchIt, Skwibl.com, qTrace, JumboLogic, ConceptShare, Flowcast, Xiffe.com, InSite Feedback, Flatsies, Notism, DebugMe are some alternatives to Moqhub.