I think Trello works exceptionally well for architectural project management because its features align with the way design projects are organized. Trello’s flexibility easily accommodates an unusual project and all types of other projects.
The images below show how.
Take a closer look at the example I have been describing by subscribing to Architekwiki and then following the link in the archive to PM-Steps v1.0, a public board that you can copy and use to start your own master.
I think that Trello is the best Project Management tool that I have ever seen. When you combine Trello with the STEPS* concept, I don't know how you can beat it. Especially since it is so simple and entirely free.
* If you want to explore the STEPS concept, see this post.