GPSAR, gps action replay, even the old free version Gpsar333, is a very small but sailing specific bit of software made a few years ago by a french windsurfer interested in speed runs

it can do a lot of fun things, like make polars, set different colors for different speeds, give averages of 500mtrs etc.

the map part takes a bit of mucking around though

it has some wind direction finding abilities that presumably work well if the wind blows consistently

however it doesn't work too well on small mountain lakes where the wind channels down valleys and around islands etc.

GPSAR is what i use to analyse my sailing on my computer

http://gpsactionreplay.free.fr/

the wind direction note on the youtube video was a youtube annotation that i added to help make sense of the sailing for non-sailors

but to share animated tracks it is much easier to use internet based animators like mapmytracks

but mapmytracks is not sailing specific and so has less sailing functionality