Update: URL Fixer was acquired and is now hosted at http://urlfixer.org/

I’ve updated URL Fixer to version 1.3.1; new features since 1.3 are a Czech translation and a fix so that it no longer tries to correct www.orf.at (a popular Austrian news site) to www.org.at (not a popular Austrian news site).

You can install or upgrade URL Fixer from its homepage.