A simple CalDAV (calendar) and CardDAV (contact) server.

📆 CLI calendar application

📇 Synchronize calendars and contacts.

Javascript parser for ics (rfc5545) and vcard (rfc6350) data

icalendar parser library for Python

A Java library for parsing and building iCalendar data models

iCalendar (ics) file generator for node.js

Pythonic and easy iCalendar library (rfc5545)

Lightweight and fast recurring dates library for PHP (RFC 5545)

Generate calendars in the iCalendar format

jtx Board allows you to manage your Journals (like meeting minutes), Notes and Tasks in one Android app. The app is compatible with the iCal standard (RFC5545) and is integrated with DAVx5 to allow the synchronisation of entries through CalDAV.

✅ Simple, standards-based, command line todo (aka: task) manager.

a calendar server aiming to be simple, fast and passwordless

Parser for iCalendar Events • PHP 8+, 7 (≥ 7.4), 5 (≥ 5.6)

RenewHelper - 时序·守望是一款基于Cloudflare Workers的全栈服务生命周期提醒、管理工具。它专为管理周期性订阅、域名续费、服务器到期等场景设计。无需服务器，零成本托管，提供精美的机甲风（Mecha-style）UI 界面、强大的农历/公历计算核心、多渠道通知推送能力、iCal日程同步以及账单管理功能。同时支持Worker和Docker方式部署。

ICSx⁵ is an Android app to subscribe to remote or local iCalendar files (like time tables of your school/university or event files of your sports team).

biweekly is an iCalendar library written in Java.

📅 Generates URLs and downloadable ICS files for adding events to popular calendar apps.

🍃 Cross-platform CalDAV-compatible task management app.

All your calendars in one Android app. Sync iCloud, Nextcloud, Fastmail, and more CalDAV servers, plus your device's Google and Outlook calendars. Private by default: no ads, no trackers, no account.