Carrot2 is an open source clustering search engine. In addition to organizing results into useful clustered categories, it offers nifty visual features.
Yippy is also a clustering search that searches other search engines. Explode those little plus signs in the left frame to see subcategories.
Listen Notes: podcast search engine. It's like Google, but for podcasts. You can search; episodes by people, places, or topics—(almost) all podcasts you can find on the Internet.
Universityvideos.org: 1.) Video transcript plays in sync with the playing video, enhancing the user experience 2.) Video Search - enhanced and advanced search capabilities, plus hit to hit navigation 3.) Video Clip and Share—instant and automatic sharing of important video clips 4.) Video Transcript Navigation, allowing viewers to jump to any spot in the video.
DuckDuckGo not only offers a clean, simple interface, it prides itself on being a zero-click results page, with all results displaying as one, often very long, scroll. It does not track your searches.
Startpage/Ixquick: this recent merger offers Google-generated and Google-style results, including an easily-accessible Advanced Search with Ixquicks’ privacy features.
Google’s significant other treasures
Google Alert: Instructions on how to create a Google alert.
Google Books: While not every book result is available as a preview, Google Books is an underused treasure filled with a different type of content in preview, Google eBooks, and free Google eBooks.
Google Scholar: offers a step into academic research for many users who know of its treasures. It links to many libraries’ database offerings as well as available open access articles with pdf and links to the right of a result.
Google Images: The reverse image search allows you to identify image sources or what an image actually is.
Google News: This very handy news search offers hidden features. In Settings, students and teachers can manage their news sections, pushing their interests to the front page.