Processing
Used by 27 peopleprocessing.org ↗

“The latest version of the Processing IDE for tinkering and producing media works.”
Luis Mercado Interview, Professor, artist · via Uses This 
“Processing is what I use to test out more visual effects or artistic interactions.”
Chelsea Howe Interview, Creative Director (Electronic Arts) · via Uses This 

“Earlier this year I developed more in Processing and its associated libraries because that's the language I teach our budding designers at the university.”
Pippin Barr Interview, Game maker, writer, teacher · via Uses This 
“I've dabbled in Processing, and thought it was awesome, but haven't had enough time to devote to doing anything significant with it so far.”
Emily Short Interview, Interactive narrative consultant · via Uses This 
“Processing is my go-to programming environment when I work with graphics.”
Michael Ogawa Interview, PhD student, developer (code_swarm) · via Uses This 

“In my spare time (and to support our own work), Casey Reas and I develop Processing, which we describe as "an open source programming language and environment for people who want to program images, animation, and interactions." We're trying to make it easier for artists, designers and architects to work with code; and to get computer scientists and engineers thinking about art and design concepts.”
Ben Fry Interview, Data designer, co-creator of Processing · via Uses This 
“I use Processing mainly for quick sketching of visual ideas, but also for random development needs.”
Steph Thirion Interview, Game developer (Eliss) · via Uses This