Which formats are read and written by gpsbabel?

gpsbabel is used for binary formats like

• Alan Map 500 Waypoints and Routes (*.wpr)
• Microsoft AutoRoute 2002 to 2006 (*.axe)
• Garmin MapSource 6.x (*.gdb)

and rare formats like

• National Geographic Topo 3 to 4 (.tpo)

All in all about 16 formats use gpsbabel.