Google Labs' Similar Images and Google Timeline
Google has rolled out Similar Images and Google Timeline. Since it can sometimes be difficult to find the right image on the Web by just using words, Similar Images uses "visual similarity" -- that is, "you don't have to refine the text of your search, instead, you can just click on the link of an image you like."
"Google News Timeline organizes information chronologically by presenting results from Google News and other data sources on a zoomable, graphical timeline," according to the blog post. "You can navigate through time by dragging the timeline, setting the time scale to days, weeks, months, years, or decades, or just including a time period in your query (i.e., '1977')."