Several short Maple scripts for some standard perturbation methods, as described in my ACMES paper with Nic Fillion which you can find at the Springer site or at the arxiv.
The scripts were originally provided in a Maple Workbook, which reads them in in a way so as to show their output.
The scripts are surprisingly easy to modify to solve other perturbation problems.
We are now writing a book on the subject, and are adding new scripts. In particular, we have decided to move to Jupyter Notebooks (with a Maple kernel). We also will supply the HTML exports from these Notebooks so that people can read them without having to install Jupyter.