EzStatic
The Purpose of EzStatic

EzStatic allows you to display pre-built HTML and PHP pages inside your regular WordPress layout. It will also allow high-level users to embed PHP code directly in their posts or static pages in WordPress 1.5.

For example, if you have an HTML file called sample.html, and you want its contents to appear inside your WordPress template, you would be in for an ordeal. You would need to either create a new post and paste the content from the file into it, or copy the template information from WordPress into your HTML file.

EzStatic will extract the content from your HTML file and insert it where the posts would normally appear, without much fuss. This can be done with static HTML files or dynamic PHP files.

Pretty cool, and oh yeah, also necessary to use the Photopress plugin.