Responding to a lazyweb request, Matthew McCowan built a handy little script/app for building shotlists from screenplays written in Fountain. Stu Maschwitz explains:
Fountain’s Notes [[like this one]] can contain any text you like, including multiple paragraphs. Since Notes don’t print, you can use them to store all kinds of useful information, such as notes on revisions, character bios, or even text that can have special, nerdy powers.
In this case, McCowan’s script is looking for notes that start with SHOT: and gathering them with the scene header to form a tidy shotlist. But you could easily generalize this to gather all notes, or tweak it to look for another criteria such as the name of the person giving the note.
One of the huge advantages of Fountain is its easy extensibility. Any tool that can work on plain text can work with Fountain.