ET

ETAR

Open-source calendar server companion for events

Calendar & Contacts ★ 2.6k stars Medium setup GPL-3.0

A self-hostable calendar event service that exposes CalDAV and an event API for personal scheduling. It can be paired with mobile sync clients to keep events available across devices.

Key features

  • CalDAV support
  • Event API
  • Mobile sync friendly
  • Open data formats

Pros & cons

Strengths

  • Open ecosystem
  • No vendor lock-in

Trade-offs

  • Mainly a client project
  • Server piece is minimal

ETAR replaces

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