Low-frequency oscillations in the inertial frequency range are emerging as powerful diagnostics of the internal structure and dynamics of rotating stars. Observed in both the Sun and intermediate-mass stars, these oscillations provide unique insights into differential rotation, convection, and magnetic fields. Yet, the solar and stellar communities have largely developed independent approaches to modeling and interpreting these modes. This workshop, organized by the Max Planck Institute for Solar System Research, brings together experts in helio- and asteroseismology, as well as specialists in numerical methods and data analysis, to exchange tools, data, and theoretical frameworks. By fostering cross-disciplinary collaboration, we aim to better exploit low-frequency oscillations as tools for probing the structure, dynamics, and magnetism of the Sun and stars.