I swapped my office chair for a kneeling chair and it was surprisingly versatile | Mashable
Ergonomically Designed 5-Caster Rolling Knee Chair - On Sale - - 6716014
Amazon.com: VIVO Kneeling Chair with Wheels and Back Support, Adjustable Ergonomic 360 Swivel Stool for Home and Office, Mobile Angled Posture Seat with Cushions, Black, CHAIR-K06S : Home & Kitchen
JOMEED Black Adjustable Ergonomic Home Office Kneeling Chair with Angled Fabric Seat UP007 - The Home Depot