Because using the technology is often better that trying to reproduce it ourself OpenSource is a nice initiative in order to help researcher in their quest !
OpenMVG "open Multiple View Geometry" is a library for computer-vision scientists and especially targeted to the Multiple View Geometry community. It is designed to provide an easy access to the classical problem solvers in Multiple View Geometry and solve them accurately.
Libmv: is a structure from motion library, which plans to one day take raw video footage or photographs, and produce full camera calibration information and dense 3D models.
Groupsac: The source code of GroupSAC is being maintained as a Google code project by KaiNi and me in both C++ and Matlab. The goal is to supply a general and solid RANSAC implementation that covers traditional RANSAC, PROSAC, and GroupSAC. More details will be followed when the final release is ready, and you are welcome to download the latest code and give us your feedback.
OpenSourcePhotogrammetry: With the target to ease the access to photogrammetry tools. This tools is a python interface that allow to launch BUNDLER and CMVS/PMVS in order to perform 3D dense point cloud reconstruction.
Ac-Ransac: Automatic homographic registration of a pair of images, with a contrario elimination of outliers.
Bundler (CMake cross platform version) Could be built on linux/windows/mac.
CMVS/PMVS (CMake cross platform version) Could be built on linux/windows.