The un-registered versions are fully functional but time limited and feature:

• Latitude-Longitude (Great circle and Rhumb line tracks)
• Wind triangle (Hdg/Gs, Trk/Gs, W/v, Crosswind-Headwind components)
• Fuel planning (Fuel consumption, Speed-Time-Distance)
• Weight and Balance (Take off/landing weight and centre of gravity)
• Altitude-Airspeed (Density alt, Pressure alt, True alt, TAS-RAS-MACH)
• Vertical navigation (Rate of climb, Top of climb, Rate of descent, Top of descent)
• Timer (stopwatch functions)
• Utilities (Logbook totaliser, Costing, Holding patterns, Critical point, Point of No Return, Sunrise-Sunset)
• On-line help