An hourglass dulcimer with a spruce top.
A McSpadden teardrop or pumpkin seed dulcimer. Another spruce top.
A cardboard training dulcimer, used for beginners' classes. These sound surprisingly good.
Another hourglass dulcimer
This small dulcimer is a "backpack" dulcimer, and is one octave higher than a full size dulcimer.
A "courting" dulcimer, which would allow a courting couple to play together without direct supervision, as long as the chaperon in an adjacent room can hear two people playing, all is well.
A Kantele, a Finnish cousin of the dulcimer, built by Stephen Dahl.
A Langeleik, from Norway, another dulcimer like instrument with partial bridges, built by Stephen Dahl.