That would be the Google Search that is in the free tools Extension:
http://www.webassist.com/dreamweaver-extensions/free-tools
see the following tutorial:
http://www.webassist.com/tutorials/Getting-started-with-Google-Search
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.