KanbanFlow

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

Collaborative kanban boards. Optional ‘pomodoro’ time tracking.

Commercial tool, free basic version, registration required. Released 2011.

unlimited boards and tasks, time management
$54/year
analytics, storage integrations, viewers, backups, custom fields...