I know this is a freshwater forum, but my primary boat that I built is mostly used in the salt.
It's a 23' tolman widebody powered by a 140 horse suzuki.
The inflatable we carry on top is dual purpose and we use it a fair bit in local lakes
Got my wife a little kayak that we use in both salt and fresh water.
Don't have a photo but we picked up an Old Town canoe a few years back when Sportsman's warehouse had a great sale due to some scratches.
And under the category of other boats I'm building a Merten's D4 (almost done)
(someone that finished theirs)
And a geodesic airolite snowshoe 18 canoe (still haven't started on it, well other than ripping the stock for the stringers and ordering the kevlar and dacron)