Jeromeetienne.github.com/jquery-qrcode/ Jquery.qrcode.js is jquery plugin for a pure browser qrcode generation.
It allow you to easily add qrcode to your webpages. It is standalone, less than 4k after minify+gzip, no image download. It doesnt rely on external services which go on and off, or add latency while loading. It is based on a library which build qrcode in various language. jquery.qrcode.js wraps it to make it easy to include in your own code.
Jquery.qrcode - jquery plugin for pure browser qrcode generation on Jerome Etienne blog. Zxing - Multi-format 1D/2D barcode image processing library with clients for Android, Java. Files/datasheets/misc/qr_code.pdf.