There are also these: https://bridgecontest.org/resources/pre ... -software/
Formerly called the West Point Bridge Designer, I've worked with some of the older versions. Not an app (download on Windows or Mac) but pretty cool to play around with.
Past: Forestry, Disease, Meteorology, Towers, Sounds, Triple E, Boomilever, Entomology, WQ, WIDI, Bridges
Total Medals: 14
State Medals: Sounds of Music (2nd, 2013), Forestry (3rd, 2013), and Triple E (4th, 2013)
Gelinas and Ward Melville Alum, ELI Volunteer