I like doing complex things in a simple way (such as writing code), so for Powerpoint, it always feels troublesome to let the mouse run around to make a presentation. HackMD could be used to create Slides, which is impressive!
As a team consisting of CSIE students, it is natural for us to use markdown for writing. Therefore, HackMD is an excellent platform for team collaboration compared to other choices.
The most common way for music producers to edit scores is to use commercial score software. The completed score must have specific software to open or save as .pdf to read, after I knew HackMD supported ABC Notation, I had a new option. When I want to edit, I use ABC Notation to write music, and share music scores through HackMD directly. Hope my experience of HackMD can that more people try this different way to create music.
I am a training/educator, often need to organize projects, teaching documents, but also need to assign homework and collect return homework, tried different software services in the market, HackMD is the most convenient, lightweight, based on the sharing of knowledge platform!