CSRDU has just released its first open source contribution through sourceforge.net. It’s a PHP-based script (plus a dialplan) for sending fax through asterisk from a web interface. You can read more about it on my blog here.
The source can be downloaded from the sourceforge website at the following link: http://sf.net/projects/webfax
You can also download (and contribute) through SVN here: https://sourceforge.net/scm/?type=svn&group_id=363461.