Use these links for the final published version and preprint version of the "Alchemical Metadynamics: Adding Alchemical Variables to Metadynamics to Enhance Sampling in Free Energy Calculations"
Example from the paper can be found at Alchemical Metadynamics PLUMED nest entry with the GitHub repository of the examples here.
Use these links for the final published version and preprint version of "Replica Exchange of Expanded Ensembles: A Generalized Ensemble Approach with Enhanced Flexibility and Parallelizability".
The GitHub repository of examples is at https://github.com/shirtsgroup/ensemble_md/
Here's the preprint of the MT-REXEE study! The current code can be found at the MT-REXEE itHub Repository.
Check out the review linked here for more information on the different elements of enhanced sampling simulations.