PHPQRCode is open source (LGPL) library for generating QRCode, 2-dimensional barcode. Based on libqrencode C library, provides API for creating QRCode barcode images (PNG, JPEG thanks to GD2). Implemented purely in PHP.
Easy PHP Backup is a ph class designed to simplify the creation of full backups of your mysql database. Using this class you can create and schedulate backup of your database with very few lines of php code.