Outgrow - Enabling marketers boost conversion with interactive, beautiful & viral quizzes/calculators.
Crowdin - Localize your product in a seamless way
Quizzes for Pages - Quizzes for Pages is an application to create and share quizzes on your Facebook Page.
POEditor - The translation and localization management platform that's easy to use *and* affordable!
1World Online - 1World's Platform consists of applications like polls, quizzes, surveys, and debates to boost engagement and revenue opportunities.
Lokalise - Localization tool for software developers. Web-based collaborative multi-platform editor, API/CLI, numerous plugins, iOS and Android SDK.