less than a minute  

Vikunja

Vikunja is an open-source task management platform.

Vikunja supports hierarchical organization of projects with subprojects and offers four ways to display tasks — a classic list, a Gantt chart, and a Kanban board.

In addition to core features like due-date reminders and recurring tasks, it provides the ability to split tasks into subtasks, assign labels, save filters, link tasks via relations, and CalDAV integration for calendar synchronization.

• Official project website
• Demo without sign-up
• Documentation
• Source code (Github)

About SSO integration

• Users can only log in via SSO

For details, what is SSO and how to use it?

Recommended clients

• WEB-interface: Accessible after installation at https://vikunja.YOUR.DOMAIN
• Tasks.org: Android app that can sync with Vikunja via CalDAV