They are the best lyrics site on the net, period. The annotations are... not always that great.

The annotations that journalists do on speeches can be super useful.

But in general... I'd like to have a portable system to annotate PDFs, textfiles, etc. Local files. Take notes and cross-link against multiple files & multiple notes.

I've been making notes sporadically for a decade about such a thing, with occasional bits of code that don't really solve the problem. Currently I'm playing with a neo4j backed proto-prototype. :: shrug ::