Good idea by Carly:

Trello is a web application I’d used for project organization before, and I realized that with the assistance of the Custom Fields power-up, I could pretty much get every field needed to run a portfolio just from their API. Just on a standard card, I can input a title and description, add image attachments, and tag it with labels; custom fields gave me the ability to add the project completion date and URL.

Phil Hawksworth recently wrote a more extensive post on it too, with an updated API to use.

Have to remember that one when building a new workshop exercise. 🙂

2017 post by Carly: Using Trello as a CMS →
2020 post by Phil: Using Trello as a Super Simple CMS →