The Answer Bank - The Answer Bank is the UK’s leading question-and-answer site.
Mockuuups Studio - Fast and easy way to create product mockups on macOS, Windows and Linux.
Blurtit - Blurtit is a Q&A website. You can ask a question or answer on any question.
Mediamodifier - Create beautiful designs and product mockups in seconds.
AllAnswered - Your Team's Collective Brain All-In-One Knowledge Management System Wiki + Q&A + Workflow + AI
mockDrop - Is a webapp for creating free device mockups including your screenshots.