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• Able2Know  - A volunteer-run, expert website provides help with art, news, travel and culture, education, literature, technology, careers, and more.
• Akatoo  - Invitation only, private knowledge network where users can ask questions and receive expert answers. Includes online contests and rewards quality knowledge sharing with prizes such as an academic scholarship.
• All Experts  - Free question and answer site with volunteers waiting to answer user submitted questions.
• Animated Explanations  - Offers interactive tutorials, instructional videos, and animated movies for a large variety of topics.
• AOL Answers  - Questions and answers site enables the sharing of knowledge, information, and opinions.
• Ask the Inventors  - Inventor resource allowing newcomers to ask experienced inventors questions.
• Ask Yahoo  - Users pose questions that are answered by Yahoo staff. Topics include arts, business and finance, education, entertainment, government, and more.
• AskAnOwner.com  - Enables users to send questions directly to people who have hands-on experience with exactly the product, service, or place of interest.
• Ask-Dr-S.com  - Teacher, parent, or educator resource answers questions on formal and informal education and instruction.
• Avvo  - Source for free expert advice from highly rated doctors and lawyers.
• Big Think  - Provides a place where regular people can share a multi media learning experience with other users and experts on a wide variety of topics.
• Community Learning Network: Ask an Expert Sources  - List of experts in various subject areas and specific careers so K-12 students can have direct access to experts in fields of individual interest.
• Difference Between  - Provides articles on the difference between two items, such as "alcohol and water", "Microsoft Excel and Microsoft Access", "Sumerians and Egyptians", and many others.
• Edufax  - Offers free advising services, books and guides, planners, and answers to various questions about education or schooling.
• Evisors  - Online marketplace for expert advice and consultancy. Helps connect professional advisors with those who need their services. Presents expert profiles with accompanying ratings and credentials.
• Excel-Formulas.com  - Answers to questions on using Excel with video tutorials and Excel mathematical formula guides.
• Explania  - Animated explanations on a variety of topics. Find interactive tutorials and instructional videos.
• Focus Educational Services  - Offers advice and answers to academic questions from students.
• Help That  - Ask a question and get answers and problem solvers on a variety of subjects.
• Howcast  - Offers how-to videos and articles on a variety of subjects such as Business and Finance, Mind and Body, and Sports and Fitness.
• Instructables  - Offers user-contributed tutorials on a wide variety of topics such as cooking, arts and crafts, pets, science, and sports.
• Life123  - Answers questions on a large variety of topics such as how to throw a party, what trees to plant, and should I homeschool?
• Limbido Guru  - Questions and answers site particularly intended for mothers and mothers-to-be.
• Locql  - Location-based question and answer site. Allows users to ask and share information about various places.
• Moontoast  - Offers an online marketplace of human knowledge which allows users to search profiles for an expert, agree on a price, and speak directly with the expert using the site's video player.
• Pic Answers  - Offers an online question and answer service based on photos displayed.
• QandAs.com  - Question and answer reference community ranging in topics from food to finance.
• Quora  - Online Q&A knowledge database with social networking elements. Allows users to post or answer questions across a huge variety of topics.
• SnapAsk  - Provides users with quick answers to common questions about topics such as flights, traffic, weather, sports scores, and news.
• VideoJug  - Offers advice and how-to instructions in video format. Covers a variety of subjects, including technology, health, sports, leisure, and love.
• wikiHow  - Compilation of written articles which serve as how-to manuals.
• Yahoo! Answers  - Accommodates question submissions, provides various categories of questions and answers, and features new information of interest.