Java HTML/XML Compressor is a very small, fast and easy to use library that compresses given HTML or XML source by removing extra whitespaces, comments and other unneeded characters without breaking the content structure.
PHP Compressor is a PHP class that compress a selected directory and files into an install.php file.
You can chose the destination directory where decompress the file, and you can chose a file that will be executed at the end of decompression.
JSC (JavaScript Compressor) is a command line utility used for compressing external .js files by removing all comments, line breaks and unnecessary white space.