Open-source Meetings Scheduling tools

The best open-source Meetings Scheduling tools, curated: 7 in the registry, including caldav (python-caldav), Easy!Appointments, gcalcli. Every tool is open-source; each entry lists license, self-hostability, and links.

7 tools · ← all categories · JSON

• caldav (python-caldav) — tool, 2026-09-03
  ~411 stars; complements vdirsyncer, khal; Open-protocol CalDAV client (works with Nextcloud, iCloud, Google via CalDAV). Auth via basic/app-password/OAuth per server. Open standard — no ToS/ban risk. Dual GPL-3.0/Apache-2.0.
• Easy!Appointments — tool, 2026-09-03
  Longest-lived booking; dated PHP; no routing
• gcalcli — tool, 2026-09-03
  ~3800 stars; complements google-api-python-client (official-api); CLI over the sanctioned Google Calendar API. Auth via Google OAuth (own client credentials). No ToS risk.
• khal — tool, 2026-09-03
  ~3000 stars; complements caldav, vdirsyncer; Standards-based terminal calendar; syncs to CalDAV servers via vdirsyncer. Open protocol — no ToS/ban risk.
• Rallly — tool, 2026-09-03
  Group availability polling; no lead routing
• vdirsyncer — tool, 2026-09-03
  ~1900 stars; complements caldav, khal; Open-protocol CalDAV/CardDAV sync CLI. Auth per server (basic/app-password). No ToS/ban risk.
• Vexa — tool, 2026-09-03
  Bot-joins Meet/Teams/Zoom; 2 patched advisories; consent law caveat