Here is a list of all documented files with brief descriptions:

[detail level 123]

src
libical
icalversion.h	Declares macros for determining the library version
src
libical
byref.c	Function wrappers to handle non-structured return type interoperability
icalarray.c	An array of arbitrarily-sized elements which grows dynamically as elements are added
icalarray.h	An array of arbitrarily-sized elements which grows dynamically as elements are added
icalattach.c	Implements the data structure for iCalendar attachments
icalattach.h	Defines the data structure for iCalendar attachments
icalcomponent.c	Implements the data structure for iCalendar components
icalcomponent.h	Defines the data structure for iCalendar components
icalduration.c	Implements the data structure for time durations
icalduration.h	Defines the data structure for time durations
icalenumarray.c	Implements the data structure for handling arrays of enums
icalenumarray.h	Defines the data structure for handling arrays of enums
icalenums.c	Defines enums not belonging to other data structures
icalenums.h	Defines enums not belonging to other data structures
icalerror.c	Error handling for libical
icalerror.h	Error handling for libical
icallimits.c	Implements the interface for getting/setting internal library limits
icallimits.h	Defines the interface for getting/setting internal library limits
icalmemory.c	Common memory management routines
icalmemory.h	Common memory management routines
icalparameter.c	Implements the data structure representing iCalendar parameters
icalparameter.h	Defines the data structure representing iCalendar parameters
icalparameter_cxx.cpp	Implementation of C++ Wrapper for icalparameter.c
icalparameter_cxx.hpp	Definition of C++ Wrapper for icalparameter.c
icalparser.c	Line-oriented parsing
icalparser.h	Line-oriented parsing
icalperiod.c	Implements data structures for working with iCal periods (of time)
icalperiod.h	Defines data structures for working with iCal periods (of time)
icalproperty.c	Implements the data structure representing iCalendar properties
icalproperty.h	Defines the data structure representing iCalendar properties
icalproperty_cxx.cpp	Implementation of C++ Wrapper for icalproperty.c
icalproperty_cxx.hpp	Definition of C++ Wrapper for icalproperty.c
icalrecur.c	Implementation of routines for dealing with recurring time
icalrecur.h	Routines for dealing with recurring time
icalrestriction.h	Functions to check if an icalcomponent meets the restrictions imposed by the standard
icalstrarray.c	Implements the data structure for handling string arrays
icalstrarray.h	Defines the data structure for handling string arrays
icaltime.c	Implements data structure for representing date-times
icaltime.h	Defines the data structure for representing date-times
icaltimezone.c	Timezone handling routines
icaltimezone.h	Timezone handling routines
icaltypes.c	Implements the functions to manipulate internal types
icaltypes.h	Define internal types and provide functions to manipulate them
icalvalue.c	Implements the data structure representing iCalendar parameter values
icalvalue.h	Defines the data structure representing iCalendar parameter values
icalvalue_cxx.cpp	Implementation of C++ Wrapper for icalvalue.c
icalvalue_cxx.hpp	Definition of C++ Wrapper for icalvalue.c
icptrholder_cxx.hpp	C++ template classes for managing C++ pointers returned by VComponent::get_..._component, VComponent::get_..._property, ICalProperty::get_..._value
vcomponent_cxx.cpp	Implementation of C++ Wrapper for icalcomponent.c
vcomponent_cxx.hpp	C++ classes for the icalcomponent wrapper (VToDo VEvent, etc..)
libicalss
icalbdbset.c	Manages a Berkeley database of ical components and offers interfaces for reading, writing and searching for components
icalbdbset.h	Manages a Berkeley database of ical components and offers interfaces for reading, writing and searching for components
icalcalendar.c	Routines for storing calendar data in a file system
icalcalendar.h	Routines for storing calendar data in a file system
icalclassify.c	Implements functions for classification
icalclassify.h	Defines functions for classification
icalcluster.c	Implements the data structure for calendar clusters
icalcluster.h	Defines the data structure for calendar clusters
icaldirset.c	Manages a database of ical components and offers interfaces for reading, writing and searching for components
icaldirset.h	Manages a database of ical components and offers interfaces for reading, writing and searching for components
icalfileset.c	Manages a database of ical components and offers interfaces for reading, writing and searching for components
icalfileset.h	Manages a database of ical components and offers interfaces for reading, writing and searching for components
icalgauge.c	Routines implementing a filter for ical components
icalgauge.h	Routines implementing a filter for ical components
icalmessage.c	Implements functions for creating component reply messages
icalmessage.h	Defines functions for creating component reply messages
icalset.c	Icalset is the "base class" for representations of a collection of iCal components
icalset.h	Icalset is the "base class" for representations of a collection of iCal components
icalspanlist.c	Code that supports collections of free/busy spans of time
icalspanlist.h	Code that supports collections of free/busy spans of time
icalspanlist_cxx.cpp	C++ class wrapping the icalspanlist data structure
icalspanlist_cxx.hpp	C++ class wrapping the icalspanlist data structure
libicalvcard
vcardcomponent.c	Implements the data structure representing vCard components
vcardcomponent.h	Defines the data structure representing vCard components
vcardenumarray.h	Namespace the icalenumarray functions for vcard
vcardparameter.c	Implements the data structure representing vCard parameters
vcardparameter.h	Defines the data structure representing vCard parameters
vcardparser.c	Line-oriented parsing vCard format
vcardparser.h	Line-oriented parsing vCard format
vcardproperty.c	Implements the data structure representing vCard properties
vcardproperty.h	Defines the data structure representing vCard properties
vcardrestriction.h	Functions to check if a vcardcomponent meets the restrictions imposed by the standard
vcardstrarray.h	Namespace the icalstrarray functions for vcard
vcardstructured.c	Implements the data structure representing vCard structured values
vcardstructured.h	Defines the data structure representing vCard structured values
vcardtextlist.c	Implements functions for creating vCard text lists
vcardtextlist.h	Defines functions for creating vCard text lists
vcardtime.c	Implements the data structure representing vCard date-times
vcardtime.h	Defines the data structure representing vCard date-times
vcardtypes.h	Defines vcard internal types
vcardvalue.c	Implements the data structure representing vCard values
vcardvalue.h	Defines the data structure representing vCard values