Greatest Paper Airplanes (Windows/Macintosh)
A shareware program with a few designs
(and lots more if you buy the full version) and sections on making planes,
throwing them, modifying them and safety.
Or try the following FTP sites (although
only the UK one seems to be reliable):
Aunt Annie's Crafts (Windows)
Another shareware program which includes
some paper airplanes (although I haven't tried it). The full version can
be ordered on-line as well.
edited by : kuldip