"Want more tools? Visit our
site: http://www.top999tools.com and get full info about
Top tools updated for 2017."
Question and Answer
Stack Exchange is a network of 150+ Q&A communities
including Stack Overflow, the preeminent site for
programmers to find, ask, and answer questions about
Quora is a place to gain and share knowledge. It's a
platform to ask questions and connect with people who
contribute unique insights and quality answers
Yahoo! Answers is a community-driven question-andanswer
(Q&A) website or a knowledge market from
Yahoo!, that allows users to both submit questions to be
answered and answer questions asked by other users.
Stack Overflow is a community of 7.2 million
programmers, just like you, helping each other.
Answers.com is the place to go to get the answers you
need and to ask the questions you want.