Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
Adobe XD - Adobe XD is an all-in-one UX/UI solution for designing websites, mobile apps and more.
Sculptris - Sculptris: Enter a world of digital art without barriers.
UXpin - Design is really about solving problems. UXPin is the UX Design Platform that gets that right.
ShapeShop - ShapeShop is an advanced and professional 3D design and modeling application that comes with an easy-to-use and user-friendly interface.