RheoVolution (Rheology evolution) numerically investigates the dynamical evolution of deformable celestial bodies. Each body can be considered as a point mass, a rigid body, or a deformable body, where both the centrifugal and tidal forces can be set independently, and a permanent deformation (triaxiality) can also be assigned to each body. RheoVolution uses the GNU Scientific Library (GSL) for some tasks, such as numerical integration of ODEs, matrix diagonalization, and linear systems solving, and the package contains a Makefile to compile and help run the code.