One-wheeled balancing robots

electrically-driven self-balancing vehicle with a single wheel and two footpads next to the wheel

one-wheeled personal transporter

thumb|The CMU Ballbot, the first successful ballbot, built by Prof. Ralph Hollis (not in picture) at Carnegie Mellon University, USA in 2005 thumb|The BallIP, developed by Prof. Masaaki Kumagai at Tohoku Gakuin University, Japan in 2008 thumb|The Rezero developed at ETH Zurich, Switzerland in 2010 thumb|The Kugle ballbot developed at Aalborg University, Denmark in 2019 thumb|The CMU Ballbot with a pair of 2-degrees of freedom (mechanics)|DOF arms (2011). It is the first – and currently the only – ballbot with arms.

Personal Mobility Device by Honda