I have said it on other threads; i am using (for the last 10 years, with every so many years getting the upgraded version)
Aerolog pro its probably one of the lesser known programs but it beats ALL the other crappy logbook's. non of that "1 version download" and it includes a special pocket pc version for on your handheld. I am using it on my IpaQ and it makes live Soooo easy.
Pointer
No i don't get any kickback for promoting it (eventhough by now i should)