Javascript Bibtex to JSON for nodejs and the browser. It can:
Handwritten as a labor of love, not cruelly auto-generated from a grammar, tested with Jasmine.
Synchronous, block mode:
var entries = BibtexParser(text);
console.log(entries);
Asynchronous, stream mode:
var entryCallback = function(entry) { console.log(entry); }
var parser = new BibtexParser(entryCallback);
parser.parse(chunk1);
parser.parse(chunk2);