Spotted this broken link on the Chrome Extension Labs page. Looks like the Google developers forgot to update the path. Archived link: https://web.archive.org/web/2014/http://code.google.com/chrome/extensions/apps.html
My first Typo3 extension. It’s a front-end plugin that displays a customised Google search engine on your site, using Ajax with tabs for different result types – no page reload needed. You can download it from the Typo3 Forge (link no longer available). The SVN repository was at svn.typo3.org/TYPO3v4/Extensions/ajax_google_search.