[antiform]

These are the times when I wish that this technology was open-source (correct me I'm wrong), so if it was lacking, it could be added. I would love to have some similar way of turning commutative diagram sketches into TeX-ready form. It would save me hours of times fiddling with the current LaTeX packages.

[eru]

Do we have two category theorists here, or has the unlikely happened and commutative diagrams found an application in the real world?

[yummyfajitas]

They are used fairly often in geometry and analysis. Other times should be used but are not (I assume due to authors who don't know much latex).

Regardless, I'm drooling over this. If only you didn't need to use MS word to make it work...

[carterschonwald]

if you use pgf/tikz in latex, you can do commutative diagrams pretty easily in a matrix style environment where you then indicate how to draw arrows between various entries and such. It takes an hour or two of playing with to get a hang of the notation, but its pretty nice, despite its quirks