exoMMR is a package designed to find, confirm, and characterize mean motion resonances in exoplanetary systems. FEATURES: Find: calculates two bodies' proximity to resonance; returns coefficients of two- and three-body resonant angles based on orbital periods Confirm: runs suites of N-body (rebound) simulations; analyzes resonant angles from each simulation and returns center and amplitude; calculates what percentage of simulations have which angle librating Characterize: summarizes the centers and amplitudes of any librating angles; characterizes resonant chains by how many simulations have each planet dynamically decoupled; constrains parameters (e.g., mass, eccentricity) based on resonant angle libration; includes various helpful plotting functions QUICK INSTALLATION: pip install exoMMR or python -m pip install exoMMR PAPERS: MacDonald, Feil, Quinn, and Rice 2022 (The Astronomical Journal, Volume 163, Issue 4, id.162, 12 pp.) develops the framework for exoMMR and demonstrates the ability to constrain resonances with N-body simulations MacDonald and Quinn 2023 (accepted for publication in The Astronomical Journal) tests exoMMR on five additional systems MacDonald, Polania, D'angiolillo, and Fernandez (submitted for publication in The Astronomical Journal) describes the code structure and demonstrates the main features ACKNOWLEDGEMENTS: If you use this code or parts of this code for results presented in a scientific publication, we would greatly appreciate a citation. please cite exoMMR, MacDonald et al. 2023 LICENSE: exoMMR is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License or any later version. exoMMR is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with exoMMR. If not, see http://www.gnu.org/licenses/.