MetaProducts Offline Explorer 

Offline Explorer is a professional program allowing you to download any website to be able to access it without Internet connection. It means that if you need to locally backup a website, you can do it with a few clicks using this software. For example when tripping: it can happen that you don't have an Internet connection, and thus want to save some websites to access them using the local backup. It can also happen that a website announces he's going to be closed; if this website contains informations that you need, a backup of this website will help you to get these informations, even if the website closed. The sleek interface will probably remind your Office 2010: it's the same type of interface with tabs at the top and buttons on the left panel. If you only want to backup specific data, you can define filters that will exclude some filenames, protocols, or URL from the backup. If a website requires credentials to be accessed, then you can specify them in the settings to allow Offline Explorer Pro to save the website. This utility also supports other protocols than http in case if you need to save data flux. A feature that can be very useful is the web site monitoring: when the remote website changes, only changed elements are downloaded on your computer: it allows you to get an up-to-date backup without downloading data your already have downloaded.

To conclude, this program is very complete and features a sleek interface. It's however very expensive if not for a professional use.