Sketchboard.io - Visual Remote Teamwork. Solve problems and create ideas on endless whiteboard with your teammates by sketching.
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
BeeCanvas - Realtime & Interactive Whiteboard. Collect and organize everything in one place.
Sketch - Professional digital design for Mac.
Miro - Scalable, secure, cross-device and enterprise-ready team collaboration tool for distributed teams. Join 2M+ users & 8000+ teams from around the world.
Affinity Designer - Professional creative software, exclusively for Mac.