The font I created for use in producing Roman numeral analysis actually works in pretty much any program that can use fonts. I have tested it with MuseScore and LibreOffice, and I assume it will work in any commercial alternatives to these free and open source applications.

Here are links to download it in Open Type (OTF) and TrueType (TTF) formats:

Campania.otf

Campania.ttf

Choose whichever you like, they should be both work.

To use the font, just install it normally (e.g., on Windows, double-click the download file then click the "Install" button in the dialog that appears), then select and use it normally in your program of choice.

Feel free to leave comments with any suggestions or problems you encounter using Campania!