Spatial Vectors and Rigid-Body Dynamics: Spatial vectors are 6D vectors that simplify the task of describing, analysing, and calculating rigid-body dynamics
ethz-asl/geodetic_utils: Simple library for converting coordinates to/from several geodetic frames (lat/lon, ECEF, ENU, NED, etc.)
posest: A C/C++ Library for Robust 6DoF Pose Estimation from 3D-2D Correspondences