COLMAP is a free photogrammetry software available for download from Github. You can run either from the command-line or operate it like any other program with a GUI. Like most other photogrammetry software on this list, COLMAP can reconstruct 3D objects automatically either from single-camera or stereo setups.
However, since it is a program created by researchers, COLMAP also includes many highly advanced options. These are not mandatory for those users who want to generate a quick and easy 3D mesh, but they will definitely enhance the quality. For example, you can extensively define the type of camera that was used to capture the imagery. The same is true for the feature extraction process that can be tweaked for best possible results. Although the program can export a 3D mesh, you can only work with the dense point cloud the viewport. To clean up and refine the 3D mesh, you need to work with other programs like MeshLab.