[Initial draft, adapted from Mike Bowler, @mike_bowler and Dave Nicolette, @DaveNicolette]
Driver-Navigator The driver is at the keyboard, and takes a tactical view of the problem. The navigator observes and takes a strategic view of the problem, offering suggestions and asking questions. The roles may switch back and forth as needed, depending on how the work flows and how the interaction between the two people works
Useful for general development and for knowledge/skill transfer. When used for knowledge/skills transfer, the junior member takes the driver role and the senior member takes the navigator role
Ping-Pong