Cold Turkey - Cold Turkey is a free productivity program that you can use to temporarily block distractions so that you can get your work done!
SmartWindows.app - Auto arrange all your app windows, whether on one screen or many with a single click!
BlockSite - BlockSite is an extension, which automagically blocks websites of your choice.
SANeForce - SAN Pharma Sales Force Automation
Block Site Extension - This simple app lets you block websites to increase your productivity.
ReIcon - ReIcon is portable freeware that enables you to save and restore your desktop layout.