Ton Roosendaal is a Dutch software developer and film producer. He is the original creator of the open-source 3D creation suite Blender and Traces. He is also known as the founder and chairman of the Blender Foundation, and for pioneering large scale open-content projects. In 2007, he established the Blender Institute in Amsterdam, where he works on coordinating Blender development, publishing manuals and DVD training, and organizing 3D animation and game projects.

Blender is a free and open-source 3D computer graphics software tool set used for creating animated films, visual effects, art, 3D-printed models, motion graphics, interactive 3D applications, virtual reality, and, formerly, video games. Blender's features include 3D modelling, UV mapping, texturing, digital drawing, raster graphics editing, rigging and skinning, fluid and smoke simulation, particle simulation, soft body simulation, sculpting, animation, match moving, rendering, motion graphics, video editing, and compositing.