Able2Know.com – A well known site with experts answering questions for free.
AllExperts.com – Volunteers answer your questions on any number of subjects.
Answerbag.com – Categorized as to Social, Experts, Local, and shopping.
Answers.Yahoo.com – Probably the largest of the question and answer sites.
Answerlytics.com – Ask and answer questions, edit ones that are already posted.
AskMeHelpDesk.com – Provides answers in over 300 categories, allows question askers to tip the answerer.
Dizzay.com – Features different ways to get answers, including live chats for instant answers.
Fluther.com – Guides your question to the correct people and then opens the question & answer to discussion.
Guruza.com – Allows for one-on-one chatting with experts in the area you need help.
KnowBrainers.com – Ask short, concise questions and get answers.
Neighbor.com – Local answers to your questions, currently San Francisco-based.
NowNow.com – Ask a question, receive three responses via email.
Qna.Live.com – Microsoft’s entrant into the world of online answer sites.
SimplyExplained.com – Ask your frustrating questions and have them answered by experts.
TheAnswerBank.co.uk – Ask questions, get answers in any number of subjects, based in the UK.
TheOpinionAggregator.com – Enter a question and this site will search the web for answers and opinions related to it.
Tipstrs.com – Answers on many different subjects.
Wis.dm – Encourages discussion and debate of answers.
Wondir.com – Ask questions, browse current answers.
Yedda.com – Explore questions that have already been asked, ask your own.
Annoyances.org – Answers for just about any question you can come up with for every version of Windows.
Fixya.com – A place to find help with consumer electronics.
Qunu.com – Live technical help with web application problems .
Retrevo.com – Troubleshooting for consumer electronics.
Zolved.com – Ask technical questions on just about any gadget or computer, find user manuals.
WhatShouldISay.com – Unsure of what to say in a given situation? Ask advice.
Youme.us – Relationship advice, can even be accessed on the fly on your phone.
PaperCalculator.org – Calculates the environmental impact of different types of paper on the ecosystem for companies attempting to lower their impact.
Work.com – Directed to assisting small businesses with answers they need.
AnswerU.com – Ask questions about universities and schooling.
Ask A Librarian – Reference service from the Library of Congress where you ask a question and get an answer from a librarian.
Cramster.com – Ask specific questions all the way down to your textbook.
Education.com – Columns and features with the ability to ask more questions.