iVFR.net was arguably the world's first fully comprehensive web-based flight planning service. It had all of these features:

• Fully interactive map with drag-and-drop route creation
• Search and display all Australian airports and airspaces on the map
• Link to the latest ERSA page for each airport
• Live updates of area forecasts, TAFs and NOTAMs
• Aircraft type definitions, including weight and fuel calculations for the route
• Printable flight plan with lots of useful information including frequencies
• Printed plan could include workflow such as frequency changes or reminders of radio calls
• Strip chart of planned route, showing terrain and planned altitude
• Export the plan to GPS device via USB
• Check first / last light
• Recalculate from current wind
• Safety audit
• Email flight note or notification including all plan details
• Upload photos and publish the trip for friends to view on the web, with clickable photo icons where the photos were taken
• Search for accommodation and tourist attractions nearby
• ...and much more!

Sadly, some clever person in the USA patented web-based flight planning, and started aggressively litigating for millions of dollars. So iVFR.net is now nothing more than a fond memory.