namebench finds the best DNS servers to use for your machine, benchmarks them, and outputs pretty graphs to tell you why they are optimal. It supports multiple data sources such as Alexa, your browser history, or tcpdump replays in order to generate the most relevant and individualized recommendation.
QR code generator is a PHP class that can be used to generate QR Code images using Google Chart API. It can send an HTTP request to the Google Chart API Web server to request the generation of a PNG image that represents the QR code graphic for a given information snippet. Currently the class can request the generation of QR codes for information snippets of the following types: bookmark, text, SMS message, phone number, contact information, e-mail message, geo-location, WIFI access, i-appli metadata, or abitrary content-type. The generated QR code image can be returned as a string, served for download, or returned as a URL string.