Is there a software that can visually highlight focused windows more?

I do web development on my Mac and I tend to have lots of windows open. Even per application, I tend to have multiple windows opened (ie a Terminal window for tail -f error logs, one for ssh, and one for local commands). When I switch applications with ⌘tab, the visual effect on focused window is subtle and I often get confused and perform commands on the wrong window. For example, I switch to Terminal and do ⌘w to close a tab on the tail -f command, but I accidentally closed the ssh tab! Is there a Mac program that will _highlight_ or do some more effects on a focused window when I switch applications?