BioLayout Express3D 1.0 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The actual developer of this free Mac application is The BioLayout Express3D Team. The software lies within Education Tools, more precisely Science. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe.
From the developer:
BioLayout Express3D is a powerful tool for the visualization and analysis of network graphs. Networks can be produced from a wide variety of relationships between entities. It has been specifically designed for visualization, clustering, exploration and analysis of very large network graphs in two- and three-dimensional space derived primarily, but not exclusively, from biological data.
You may want to check out more software for Mac, such as Integrated Data Viewer Installer, UN-SCAN-IT Demo or ScienceMatrix, which might be similar to BioLayout Express3D.
Science Tools