In case anyone is interested, I played around with a novel musical notation paradigm a few years ago in the form of an iPad app: http://composerssketchpad.com Basically, you draw pitches directly on a horizontally-infinite canvas. By default, pitches stick to equal temperament gridlines, but you can turn off this snapping if you want to (for example) play around with a different tuning or annotate a bendy guitar... - Source: Hacker News / 5 months ago

For programmatic filling of PDFs, have a look at DocSpring: https://docspring.com. - Source: Hacker News / 2 months ago

Great post. I've spend a lot of time reading through the PDF specification over the last ~5 years while building DocSpring [1], and I still feel like I've barely scratched the surface. Qpdf is a great tool. One of my other favorites is RUPS [2], which really lets you dig into the structure of a PDF. [1] https://docspring.com [2] https://github.com/itext/i7j-rups. - Source: Hacker News / 9 months ago

Hi /u/pepeday, I’m the founder of a software product that I built to solve this problem. The service is called DocSpring: https://docspring.com We provide a platform that you can use to set up PDF templates, and automatically generate PDFs by filling in those templates with data from your database. Please feel free to send me a message and I’d be happy to speak with you and help you figure out a solution. I can... Source: over 2 years ago

- https://docspring.com/ (super advanced features, a bit bloated). Source: over 2 years ago