Kurupira WebFilter is one of the free anti porn software that comes with a good amount of features which makes it very configurable. Other than just blocking bad websites and also applications, it can also block instant messengers such as Google Talk, Windows Live Messenger and also social networking websites such as Facebook, Twitter and etc. It can also automatically take screenshots in interval and set time limits. If you go to the Settings, you can find email notification options where you can be notified when a website or application has been blocked. One of the feature that we really liked is the application exception where an application added to the list will be ignored by Kurupira WebFilter.