Quetter

Quetter is a Q&A community-driven knowledge market website that allows users to both submit questions to be answered and answer questions asked by other users. Off course you can search by genres, and you give thanks comments and ratings if get answer. Quetter provides English and Japanese languages.

Pros & Cons

Pros	Cons
Uses OAuth for Twitter login	Most of the questions are in Japanese
Provides an API for the developers

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