My opinion is no, I do not think questions which attract "lists" of answers are constructive and should be considered off-topic. I will say this: If the community believes these questions **are** on-topic, then the posts should be locked and a Community Wiki model should be used. See [The Definitive C Book Guide and List][1] and [The Definitive C++ Book Guide and List][2] for reference. [1]: http://stackoverflow.com/q/562303/2415822 [2]: http://stackoverflow.com/q/388242/2415822