Sketch 83 is widely regarded as one of the fastest and most comprehensive graphics systems available for the TI-83 series. It functions as a robust "graphic design system" within the constraints of calculator hardware.
“This is the best graphic Design system out there. It has APD on the menu plus lots of features that other graphics programs don't have.” ticalc.org · 4 years ago
"Sketch 83" refers to a highly-rated designed for drawing and image management on graphing calculators. Review: Sketch 83 Graphics System
: It is optimized for speed, often cited as the fastest system of its kind, and remains fully compatible with MirageOS .
: The program includes essential drawing tools such as pens, boxes, lines, and inverses, as well as text capabilities.
TI-83/84 Plus BASIC Graphics Programs (Drawing) - ticalc.org