http://www.lafermeduweb.net/billet/les-50-commandements-du-developpement-php-497.html
http://www.punypng.com
PunyPNG is a free website optimization tool that dramatically reduces the file size of your images
http://farhadi.ir/works/smartoptimizer
SmartOptimizer (previously named JSmart) is a PHP library that enhances your website performance by optimizing the front end using techniques such as minifying, compression, caching, concatenation and embedding. All the work is done on the fly on demand.
http://raproducts.org/purera.html
PureRa is a simple tool that does a simple job: it removes files from your computer that other mainstream cleaning programs tend to oversee. Some of our targets can simply be removed to create some valuable space while others are removed in an attempt to