Shed boss is a shed maker out of australia, and they’ve created their online shed designer to help shed buyers design a shed online and visualize what their shed is going to look like. the shed boss app is free and you can get it through google play, app store, or just download it from their website. a free tutorial on the shed boss website is helpful in understanding how much or little this program can do.. Action sheds’ 3d shed designer tool is a fun and useful tool which allows you to visualise what your new shed might look like. the tool allows you to begin designing from a specific shed type offered by action sheds. from there, you can customise everything from the building size, roof pitch, number of bays and doors as well as change the.