Showcase of surprising possibilities with TeX [duplicate]

LaTeX is more or less built to typeset books, particularly (but not exclusively) scientific literature. It is less obvious that LaTeX is also extremely good at producing

• Songbooks
• Play scripts
• Chess diagrams
• Linguistic literature and IPA
• Bibles
• Dictionaries
• Presentations
• Tolkien alphabets

Can people mention other surprising and inspring uses of LaTeX that go beyond scientific literature?

This question is meant as a place to showcase surprising uses of TeX, made by you or others, a bit similar to the posting Showcase of beautiful typography done in TeX & friends, which focuses on beautiful TeX and LaTeX documents.

• Is the formulation clear/correct enough? Other suggestions are welcome. Jan 13, 2015 at 9:47
• Fireworks at tex.stackexchange.com/questions/219349/… turned out nicer than I expected. Acrostics were somewhat fascinating, as well: tex.stackexchange.com/questions/121440/… Jan 13, 2015 at 11:39
• While the MWE's at tex.stackexchange.com/questions/176591/… just give a taste, I have found the ability to compose beautiful family trees with significant generational depth to be straightforward with a slight variation on cfr's answer at that question. Jan 13, 2015 at 11:51
• @yo' But it is perhaps surprising how many packages are available for some purposes quite far from the needs of scientific literature. Obviously, lots of things are possible in LaTeX, if you sit down and write a package for it. But as a front end user, the things that are possible for me are those provided by the packages. So it is often the very existence of some packages that is surprising. Jan 13, 2015 at 11:52
• I haven't been able to find out much about it, but I understand that typesetting music with LilyPond is very impressive. (lilypond.org) Jan 13, 2015 at 12:06