spun off from Google on October 2, becoming open source; it is now OpenRefine. TV Ads – Method to place advertising on TV networks. Discontinued on August 30, with all remaining active campaigns ending December 16. Knol – write authoritative articles related to various topics. Discontinued October 1. Yinyue (Music) (Google China) – site linking to a large archive of Chinese pop-music (principally Cantopop and Mandopop), including audio streaming over Google's own player, legal lyric downloads, and in most cases legal MP3 downloads. The archive was provided by Top100.cn (i.e., this service does not search the whole Internet) and was available in mainland China only. Discontinued in September, users were given the option to download playlists until October 19. Google Insights for Search – insights into Google search term usage. Discontinued September 27, merged in Google Trends. Listen – subscribe to and stream podcasts and Web audio. Discontinued in August. BumpTop – physics-based desktop application. Discontinued in August. Google Video – a free video hosting service. Shut down and migrated to YouTube on August 20. Google Notebook – online note-taking and web-clipping application. Discontinued in July. Google Website Optimizer – testing and optimization tool. Discontinued on August 1. Google Mini – reduced capacity, lower-cost version of the Google Search Appliance. Discontinued on July 31. Google Wave – online communication and collaborative real-time editor tool that bridge email and chat. Support ended on April 30, 2012. Slide.com – Discontinued on March 6. Google Friend Connect – add social features to websites. Discontinued on March 1, replaced by Google+'s pages and off-site Page badges. Jaiku – social networking, microblogging and lifestreaming service comparable to Twitter. Shut down January 15. Google Code Search – software search engine. Discontinued on January 15. Google Health – store, manage, and share personal health information in one place. Development ceased June 24, 2011; accessible until January 1, 2012; data available for download until January 1, 2013. 2011 Google Buzz – social networking service integrated with Gmail allowing users to share content immediately and make conversations. Discontinued in December and replaced by Google+. Google Sidewiki – browser sidebar and service that allowed contributing and reading helpful information alongside any web page. Discontinued in December. Gears – web browser features, enabling some new web applications. Removed from all platforms by November. Squared – creates tables of information about a subject from unstructured data. Discontinued in September. Aardvark – social