Some interesting new foot peripherals for movement and/or extra input. Some are currently available, others are yet to be released.
https://www.gamingmouse.com/gaming/fragpedal/quad/
https://www.kickstarter.com/projects/smaqqtalk/worlds-best-foot-controller-smaqqtalk-pivot-24-int/description
https://bcon.zone/
http://www.altoedge.com/pedals/index.html
https://www.kickstarter.com/projects/smashmouseusa/smashmouse-universal-pedal-for-hands-free-computer
http://www.stinkyboard.com/
https://www.3drudder.com/
https://www.gamingmouse.com/gaming/fragpedal/quad/
https://www.kickstarter.com/projects/smaqqtalk/worlds-best-foot-controller-smaqqtalk-pivot-24-int/description
https://bcon.zone/
http://www.altoedge.com/pedals/index.html
https://www.kickstarter.com/projects/smashmouseusa/smashmouse-universal-pedal-for-hands-free-computer
http://www.stinkyboard.com/
https://www.3drudder.com/