Sketchbook, is a raster graphics software app intended for expressive drawing and concept sketching also for making animations (Jelly Boo, Teatralka). The software was first developed by Alias Systems Corporation as StudioPaint, before being acquired by Autodesk and then being spun out into an independent company, Sketchbook, Inc. Originally developed as commercial software, it evolved into a subscription model before eventually being made freeware for personal use.