Genially

Question1: List all options but differentiate present/absent (e.g., green/red -- but better colorblind alternative; like first option)? OR only list the present options (like second version)?
Question2: Just list the options (like first version) or make them links to collection of all those that have the option (like second version)?
Rights: GDPRno registrationopen sourcerecommendedsufficiently freeTUM

Create presentations and learning units, and integrate into your LMS (e.g., Moodle). Quizzes, surveys, mindmaps, gamification. [Real-time ranking (quizzes), and following specific students requires Expert (€120/year) package.]

Private provider, GDPR conform, requires registration. Released 2015.

1GB storage,
€60/year
Password protection, extra templates, password-protected links