How much better would social search be if Google surfaced results from all across the web? The results speak for themselves. We created a tool that uses Google’s own relevance measure—the ranking of their organic search results—to determine what social content should appear in the areas where Google+ results are currently hardcoded.

All of the information in this demo comes from Google itself, and all of the ranking decisions are made by Google's own algorithms. No other services or APIs are accessed.

Rentmix was founded by a former Google software engineer who was frustrated with the state of the vacation rental market. Our full screen Google Maps and powerful search allow you to zero in on the perfect property in the perfect location. Our goal is to be the Google of vacation rentals: fast, simple, elegant. Let us know if we're not living up to that goal.

Windows/Mac: Chrome syncs nearly everything about your browser choices. Everything, that is, except the "search engines"/keyword bookmarks you've painstakingly set up. One clever Lifehacker reader has fixed that, albeit in a round-about, script-fired, Dropbox-synced kind of way.

Ludovic Chabant pointed us to his personal blog post, where he provides some how-to and packaged script shells for firing off. It's a simple trick—grabbing a copy of Chrome's SQLite-based search engine database, and re-copying it on a new system—made even more simple for non-coders, and synced up with Dropbox. You don't really need any scripting knowledge to get them working, though you might need to fix one or two things in your system to get them working properly.

Do you have a lot of Twitter followers? Do you receive a ton of messages? Are you a blogger? If you answered yes to any of those questions then probably use Twitter Search on occasion to look up replies, messages or mentions. However, the problem with Twitter Search is that it only allows you to go back 10 days. But what if you want to see what someone wrote to your 3 weeks ago?

Or how about 3 months ago?

Until now, you probably just searched page after page to find what you were looking for.

Well, this is where a little site called Snap Bird comes in to play.

BackType is a real-time, conversational search engine. We index and connect millions of conversations from blogs, social networks and other social media so you can find out what people are saying about the topics that interest you. BackType was founded in June, 2008.

Twiangulate is a tool for discovering hidden tweeters, friends of friends (or friends of enemies), micro-influentials who only insiders follow... or sometimes just friends you haven't yet realized are tweeting.

For the past two years, Go2web20 has been one of the biggest web2.0 directories out there. We built this application to enable people to stay up to date with all the new & hot services that are born daily into the web. In many cases, Go2web20 has been the first to report the existence of a new application.

I just set up an automatic backup of all 3000 of my friends' Twitter messages and became able to search through their Twitter history two years into the past with just five minutes of easy clicking. Only two things are required: Dave Winer's new Twitter OPML tool and a Google Reader account.

True to its name, TweetTabs allows you to open several tabs with different Twitter search queries. While some Twitter desktop clients also allow you to do this, TweetTabs is completely browser-based. And it’s great because it’s so simple. All you do is enter a query into the search box and a new tab will automatically pop open that will update in real-time. There are also a list of the top trending topics on Twitter across the top of the site, which you can click on to open a tab for any of those searches as well.

OneRiot crawls the links people share on Twitter, Digg and other social sharing services, then indexes the content on those pages in seconds. The end result is a search experience that allows users to find the freshest, most socially-relevant content from across the realtime web.

As she demonstrated in the video, using the example of the 1906 San Francisco Earthquake, this experimental tool from Google can be used to learn more about events that surrounded your ancestors' lives. If you know that one of your ancestors participated in a specific event, or was affected by one, use the tool to learn more about that event.

Kayak is a travel search engine. Which means we search hundreds of travel sites from all over the world, provide the information to you in an easy-to-use display and send you directly to the source to make your purchase. More than any other travel site, we help you find the perfect flight, hotel, cruise, or rental car. After all, what good are 1000 options when you can't find the flight you want? Once you make your choice, we link to the travel sites to make your purchase. Kayak allows you to choose which site to purchase from– through an online travel agency or consolidator such as Orbitz or Airfare.com. Kayak's search engine can find all kinds of travel products– from flights and hotels to rental cars and cruises. Our fare alerts and fare history help travelers stay on top of ever-changing travel prices.

searches 9 sites, including: http://www.instructables.com/, http://www.sutree.com/, http://www.tricklife.com/, http://www.videojug.com/, http://www.expertvillage.com/