Freedom Internet Blocking Software
Freedom is a simple productivity application that locks you away from the internet on Mac or Windows computers for up to eight hours at a time. Freedom frees you from distractions, allowing you time to write, analyze, code, or create. At the end of your offline period, Freedom allows you back on the internet.
Freedom enforces freedom; you'll need to reboot if you want to get back online while Freedom's running. The hassle of rebooting means you're less likely to cheat, and you'll enjoy enhanced productivity. Visit the Freedom website to learn more and download a trial version.