AllExperts.com
Volunteer experts answer all your questions.
http://www.allexperts.com/

Ask The Inventors
Free help for first-time inventors about how to go from idea to patenting, marketing and licensing.
http://www.asktheinventors.com/

Ask a Chef
Questions answered about cooking from volunteer expert chefs.
http://www.askachef.com/

Ask an Expert Sources
Index of ask an expert sites.
http://www.cln.org/int_expert.html

ask BAR
Ask questions and get free expert answers from real people in almost any topic.
http://www.askbar.com/

Ask Me Help Desk
Become an expert or ask an advisor about subjects such as homework help or interview questions at this question-and-answer community.
http://www.askmehelpdesk.com/

Since You Ask
Ask any question, researchers will find the answer and post it on the page.
http://home.flash.net/~goodkids/sya.html

Ask A Linguist
Post a question involving language to a panel of linguists; browse and search past answers.
http://www.linguistlist.org/ask-ling/

AskAnOwner.com
The AskAnOwner community gives consumers the opportunity to ask direct questions to users of products and services. They can expect honest and direct answers to there questions.
http://www.askanowner.com/

Yahoo Group: Science Help
Ask questions about biology, physics and chemistry.
http://groups.yahoo.com/group/sciencehelp/

Globe Alive
Searchable database of experts standing by to help you.
http://www.globealive.com/

UKExpert
A discussion site with a large team of expert moderators and members making up its community. It also has live news, polls, and a photographs section.
http://www.ukexpert.co.uk/

Wondir
Ask or answer questions on all topics. Responders are eligible for tips, prizes, and published ratings.
http://www.wondir.com/

Nadlan Info
Panel of construction experts responds to questions about civil engineering, architecture, interior design, and plumbing.
http://www.nadlaninfo.com/

European Experts Exchange
Multilingual experts offer their feedback on common open-source applications, including PHP and MySQL.
http://www.europeanexperts.org/

Google Answers
Now retired service where live researchers used to answer your questions on any topic for a fee. Existing answers can however still be browsed or searched for free.
http://answers.google.com/

I Recognise That
I Recognise That is a place where people can ask or answer questions about anything and everything. Someone that asks a question can also upload a photo to help illustrate that question. Questions are answered by other users.
http://www.irecognisethat.com

Askville by Amazon
User-generated questions and answers, also with discussions and expert user profiles.
http://askville.amazon.com/askville/Index.do#answers

JustAnswer
Auto mechanics, doctors, accountants and other experts answer user-submitted questions for an agreed upon fee.
http://www.justanswer.com/

Blurt It!
Users can ask questions, answer questions, and collect points for questions answered.
http://www.blurtit.com/

IQgeeks.com
Question and answer services as well as a forum for discussions of random, weird and interesting facts.
http://www.iqgeeks.com

QandAs.com
A community of experts and specialists covering dozens of topics. Must do free registration to ask a question.
http://www.QandAs.com

Videojug
A large collection of professional and amateur video tutorials, how-to videos and advice. Users may submit questions as well as video answers.
http://www.videojug.com

wiseGEEK
A growing archive of questions and answers, covering twenty different categories. Users can ask questions and comment on articles.
http://www.wisegeek.com/

iQuestions
Video answers to lifestyle questions answered by Christian experts in the areas of marriage, parenting, intimacy, finance, faith, career, and other topics. Users may submit questions, share answers, and join discussions.
http://www.iquestions.com

Able2Know - Ask an Expert
Ask an expert at this knowledge exchange where experts answer one's questions. Features discussions on diverse topics.
http://www.able2know.org/