InternetOff is a free tool that allows you to quickly turn off\on your internet connection from the system tray.

Why it's needed

The main and inherent problem with always being online is that you are too connected. Twitter, RSS feeds, YouTube video, answering email or IM message... And again from the start of the list. You only react on those "incoming" things instead of act. When you go offline all those distractions disappear. There's no Twitter. No chat. No web. Only you and your tasks. Since you cannot consume you have to create so that something happens. 

InternetOff allows you to quickly turn off the internet so that you can go offline. When you need the connection, you can enable the internet easily for some period (and it will be automatically turned off) or permanently in just two clicks. Besides the program lets you password protect access to the internet.