Free, except,
"All I ask is that should you decide to use the programme for your flight planning then please have the decency to complete the Registration form and comply with the payment details
"
Doesn't sound very free to me. Certainly didn't get me past page one.
We (a club member and I) made one up on Excel, includes flight plan with lots of tricks, cargo manifest, weight and balance graphs and envelopes for every aeroplane in the fleet (not the helicopter though, can't figure out how to display both the longitudinal and lateral CoG!). Takes a bit of time to create the first part but then you can copy and paste and edit for different aircraft. I can have a full ATO kit ready in two minutes.
Nice website though. At least page one is.