Flizle - Send and receive anonymous messages to friends like with Sarahah, but with the ability to reply.
wikiHow - wikiHow is a wiki based collaboration to build the world’s largest, highest quality how to manual.
Kiwi.qa - Kiwi is a fast and easy way to ask your friends interesting questions and find out what they think.
Blurtit - Blurtit is a Q&A website. You can ask a question or answer on any question.
Ask.fm - Curious? Just ask! Openly or anonymously.
AllAnswered - Your Team's Collective Brain All-In-One Knowledge Management System Wiki + Q&A + Workflow + AI