MathBox 2: PowerPoint Must Die
Not a quick read, but very interesting and with impressive live demos.EDIT: I really wanted to give a star to the source code, but it's not on github - it's on gitgud [1]. Honestly, for your private projects, use whatever you want, but if you have an open source one and you want discoverability and stars, use github.[1] https://gitgud.io/unconed/mathbox