Storyboard Pro
Used by 4 peopletoonboom.com ↗

“When I'm working on storyboards, I use Toon Boom's Storyboard Pro, which is the current industry standard.”
Caitlin Rose Boyle Interview, Cartoonist, storyboard artist · via Uses This 
“Storyboarding, I mainly use Storyboard Pro, now!”
Ashlyn Anstee Interview, Director, storyboard artist (Nickelodeon) · via Uses This 