MoviFax is a Web-based Hylafax frontend. Administrators gain benefits from MoviFax diagnostic tools, fax service setup/preferences, detailed logs, and corporate fax archival. Users can manage their specific preferences, browse, view, and download the PDF version of their own archived faxes. It is PHP-based, and supports several database backends (MySQL, SQLite, MSSQL, and Oracle). It works with most Web browsers.
nweb2fax is a web front-end for sending fax, using HylaFAX as backend. It also show you the sending and receiving queue, so you can kill or remove jobs.
PHP eFax is a PHP class that allows you to send faxes anywhere in the world from your PHP code on your Web server. Processing is usually instantaneous. It interfaces with eFax Developer and works on any platform that runs PHP 4 or later. It is easy to setup and use.