HTTrack is an easy-to-use offline browser utility. It allows you to download a Web site from the Internet to a local directory, building recursively all directories, getting HTML, images, and other files from the server to your computer. HTTrack arranges the original site's relative link-structure. Simply open a page of the mirrored Web site in your browser, and you can browse the site from link to link, as if you were viewing it online. HTTrack can also update an existing mirrored site, and resume interrupted downloads. WebHTTrack is a Web-based GUI for HTTrack.
UserAgent Theme Switcher is a simple plugin that lets you change the theme to be displayed according to the detected browser. It checks from a predefined list useragent so that the user can at will change the theme shown for that browser. For example, a user can configure a special theme for mobile phones that is lighter and thus adapted to these devices. It is ideal for displaying themes ready for Opera Mobile, Internet Explorer Mobile, iPhone, Android, etc.