Podcast Generator is a free web based podcast publishing script written in PHP: upload media files (audio-video) via a web form along with episode information and automatically create podcast w3c-compliant feed including iTunes specific tags. It also features a comprehensive web administration.
Very easy to install (Web Setup Wizard);
Free and open source;
Supports ANY media filetype (mp3, ogg, mpg, m4v, mov, pdf, etc...) and allows to create mixed audio and video podcasts;
The XML feed automatically generated is fully compatible with aggregators (e.g. Juice and iTunes), meets the w3c standards and supports iTunes specific tags;
Organize your episodes by thematic categories (every category features its own podcast feed!);
User friendly web administration interface: upload, edit, delete episodes and fully customize your podcast;
Dynamically created "Recent podcasts" and "Podcast Archive" web pages;