The BugMeNot addon for Firefox is one for me. I can get around stupid required registrations for sites like NYT. The other thing that made me happy was when I

The BugMeNot addon for Firefox is one for me. I can get around stupid required registrations for sites like NYT. The other thing that made me happy was when I wrote up a bunch of bash/python scripts to make my day easier at work. See a theme? Yes, I'm lazy. Also, Fullscreen Homestar Runner addon for Firefox. Required for happy viewing of H*R if you use your HD TV as you monitor.