FocusLayer places a translucent layer between it and all other windows behind the front most window. This can make it easier to tell what you're doing when there are a lot of windows open.
Version 1.4 adds the following:
- FocusLayer can now be a menu item instead of an application taking up your valuable Dock space
- Multiple monitor support fixed
- Exclusions fixed
- Other small changes
- Mac OS X 10.1 or later*Previously available here