SBEDS 4.1 can be downloaded from our website for free. The most popular versions among the software users are 4.1 and 4.0. SBEDS relates to Photo & Graphics Tools. The actual developer of the free program is USACE Protective Design Center.
From the developer:
SBEDS is an Excel© based tool for the design and analysis of structural components subjected to dynamic loads, such as airblast from explosives, using single-degree-of-freedom (SDOF) methodology.
You may want to check out more software, such as Riptide, Autodesk Civil 3D Object Enabler or graphite, which might be similar to SBEDS.