If it's not immediately apparent, Pikchr is by SQLite creator D. Richard Hipp, and is how SQLite's syntax diagrams are generated on its website. It's a great l

If it's not immediately apparent, Pikchr is by SQLite creator D. Richard Hipp, and is how SQLite's syntax diagrams are generated on its website. It's a great little diagram language that's quite capable, and I think of it like a modern web upgrade to Brian Kernighan's PIC.