There are many ways to publish iCalendar-compliant web calendars. Here are some examples of calendars that produce working iCalendar feeds, along with links to the applications, content management systems, or languages used to produce those feeds.

calendar: BAM/PFA - Daily Calendar
iCal producer: Mac 101: iCal (OS X Lion and earlier)

calendar: The Boston Musical Intelligencer » Concert & Event Calendar
iCal producer: GigPress
cms: wordpress

calendar: Week of October 28, 2012 - November 3, 2012 :: Brown University Events Calendar
iCal producer: Bedework | Jasig Community

calendar: Events - Burke Museum
iCal producer: Easy iCalendar - Devot:ee - Devoted to ExpressionEngine
cms: expression-engine

calendar: Christiansburg, VA - Official Website
iCal producer: CivicPlus - Helping Communities Engage & Interact
cms: civicplus
language: ruby

calendar: Clean Energy Coalition :: bridging needs. advancing change. :: Calendar of Events
iCal producer: WordPress › My Calendar « WordPress Plugins
cms: wordpress

calendar: Events
iCal producer: Free Online Calendars from localendar.com

calendar: Harris County Public Library | your pathway to knowledge
iCal producer: Library Management Software, Staff Scheduling Software, Calendar & Event Scheduling, Summer Reading Programs, Room Reserve, Library Software | Evanced Solutions

calendar: - Hawaii Nature Center Events Calendar, powered by Helios Calendar
iCal producer: Publish events online with php web calendar software - Helios Calendar
cms: helios

calendar: Hotmail Calendar
iCal producer: Hotmail Calendar

calendar: Kakaako | Explore places to eat, shop, learn and live
iCal producer: WordPress › All-in-One Event Calendar « WordPress Plugins
cms: wordpress

calendar: Keene Public Library
iCal producer: LibraryInsight - Room & Calendar Management
cms: libraryinsight

calendar: KEENE STATE OWLS Women's Swimming & Diving
iCal producer: PrestoSports - Every team can have a big web presence

calendar: Menlo-Atherton High School / Calendar
iCal producer: Schoolwires / Homepage
cms: schoolwires

calendar: Monadnock Folklore Society
iCal producer: WordPress › Event Calendar 3 « WordPress Plugins
cms: wordpress

calendar: Oregon Nikkei Legacy Center :: Calendar
iCal producer: dotCal | dotCal - Calendar Publishing for Business, Individuals, and Social Media
cms: dotcal

calendar: Calendar: November 2012
iCal producer: Best Online Calendar

calendar: Seattle City Council Event Calendar
iCal producer: Trumba - Calendar Publishing
cms: trumba

calendar: Seattle Public Schools - Calendar
iCal producer: flaimo-php - A couple of PHP classes - Google Project Hosting
language: php

calendar: Family Programs Happenings
iCal producer: ActiveDataX

calendar: October 2012 | Calendar
iCal producer: JCal Pro® - the events calendar for Joomla

calendar: Zen Buddhist Temple-Ann Arbor since 1981
iCal producer: Share Calendars, Files, Addresses, To Dos & Photos Online for Free
cms: keepandshare

For interactive views of this data see calendars and producers.