Pose - Pose is a web-based point of sale designed especially for small businesses.
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
PoseMy.Art - PoseMy.Art is an online free posing tool for artists.
Invision - Prototyping and collaboration for design teams
SetPose.com - Online Reference Mannequin - If you've ever drawn the human body, you probably know how hard it is to do it all from memory.
Sketch - Professional digital design for Mac.