Libical -- an implementation of iCalendar protocols and data formats
Most of the code in here was written by Eric Busboom with help from dozens of contributors. It is currently maintained by Art Cancro and Wilfried Goesgens.
Libical is an Open Source implementation of the iCalendar protocols and protocol data units. The iCalendar specification describes how calendar clients can communicate with calendar servers so users can store their calendar data and arrange meetings with other users.
Libical implements RFC5545, RFC5546, RFC7529; the iCalendar extensions in RFC6638; and some of RFC6047.
The code and datafiles in this distribution are licensed under the Mozilla Public License (MPL) v1.0. See http://www.mozilla.org/MPL/1.0 for a copy of the license.
Alternately, you may use libical under the terms of the GNU Library General Public License (LGPL) v2.1. See http://www.gnu.org/licenses/lgpl-2.1.txt for a copy of the license.
This dual license ensures that the library can be incorporated into both proprietary code and GPL'd programs, and will benefit from improvements made by programmers in both realms. I will only accept changes into my version of the library if they are similarly dual-licensed.
Portions of this distribution are (C) Copyright 1996 Apple Computer, Inc., AT&T Corp., International Business Machines Corporation and Siemens Rolm Communications Inc. See src/libicalvcal/README.TXT for details.
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Report bugs to our issue tracker at https://github.com/libical/libical/issues
See the top-level Install.txt file.
There is rudimentary, unfinished documentation in the /doc directory, and annotated examples in /examples and the test code in src/test.