"Freedom" application blocks internet access to help you avoid temptation

"Freedom" application blocks internet access to help you avoid temptationThis posting isn't an article, rather it's a potential resource for those of us who find we spend more time surfing the web than doing our work.  It blocks the Internet for up to 8 hours at a time and cannot be disabled unless you reboot your computer.  One shortcoming however is that you're not able to selectively block websites. For example, if your biggest time waster is Facebook but you still need internet access to do your real work, it would be nice to have the option to block just Facebook.  If you have any recommendations for other products similar to this, feel free to post them below.