MockMockWeb is a Heroku-ready Node.js-based Web application server which allows you to mock up a website in seconds. It allows you to instantly launch a website which sends an empty page (with status 200) to any request/URL and edit any page on the spot. You can also edit the layout shared throughout your website. It lets you build a mock (sometimes real) website in a request-driven interaction.
Mollify is Web file manager for publishing and managing files hosted on a PHP-enabled Web server, with a clean and fully customizable user interface. It is easy to install and configure, including fully configurable published directories, optionally with user accounts and access permissions.
MooTools FileManager is a file manager for the Web that allows you to view, upload, and modify files and folders via your browser. It can browse through files and folders on a server, and can display items as thumbnails. It can rename, delete, move, copy, and download files. It can show previews of images, text files, compressed files, and audio content. It can upload multiple files via FancyUpload. It has an option to automatically resize big images when uploading. You can use it as a file selection dialog in a Web application. It can be plugged in as a fileManager for TinyMCE or CKEditor. You can use it to create galleries using the Gallery-Plugin. It works with the history features of a Web browser, so the forward and back buttons have their expected behavior.