There are several free software tools available for generating 3D reconstructions from images.
- VisualSFM: http://homes.cs.washington.edu/~ccwu/vsfm/
- Bundler: https://github.com/snavely/bundler_sfm
- PMVS-2: http://www.di.ens.fr/pmvs/
- Multi-view Environment: https://github.com/simonfuhrmann/mve
- Multiresolution Surface Reconstruction: http://www.gris.tu-darmstadt.de/projects/multires-surface-recon/