Windows: If you've looked at screen-organising tools before but felt overwhelmed by bells and whistles you'd never use, you'll want to check out the simple but effective layouts and features in Gridvista.
Gridvista has five potential configurations available ranging from the entire screen as a single pane to a four-pane configuration. Multiple-monitor users who have been put off by screen managers that ignore extra monitors can rejoice, you can configure each monitor separately with Gridvista — a really handy feature when you use a side monitor for your social networking, instant messaging or other partial-screen communication applications.
Gridvista adds three buttons to application titlebars, an extensions button with a send-to-screen functionality, a lock-to-grid functionality to keep windows fixed to their particular pane, and an always-on-top button to keep windows in the foreground. You can also set Gridvista to remember panel configuration and which Windows are assigned to which panels, in between sessions. Gridvista is free and works on Windows XP and up.