Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 123]

QtXBee	Namespace common to XBee Serie1 (802.15.4) and Serie2 (ZigBee)
Wpan	XBee Serie1/Serie 1 Pro (802.15.4) specific namespace
RxBaseResponse	Base to implement a Wpan Response
RxResponse16	Reponse to a TxRequest16
RxResponse64	Reponse to a RxResponse64
RxResponseIoSample16
RxResponseIoSample64
RxResponseIoSampleBase
TxRequest16	Used to send a message over 802.15.4 network using 16 bits addresses
TxRequest64	Used to send a message over 802.15.4 network using 64 bits addresses
TxStatusResponse	Used to indicate if a packet (TxRequest64 or TxRequest16) was transmitted successfully or if there was a failure
ZigBee	XBee Serie2/Serie 2 Pro (ZigBee) specific namespace
ZBExplicitRxResponse
ZBExplicitTxRequest
ZBIONodeIdentificationResponse	The NodeIdentificationIndicator frame is received when a module transmits a node identification message to identify itself (when AO=0)
ZBRxResponse
ZBTxRequest	Causes the module to send data as an RF packet to the specified destination
ZBTxStatusResponse	Indicate if the packet was transmitted successfully or not
ATCommand	Used to query or set module parameters on the local device
ATCommandQueueParam	Allows module parameters to be queried or set
ATCommandResponse	In response to an ATCommand message, the module will send an ATCommandResponse message
ByteUtils	A tooling class to manipulates bytes or QByteArray
ModemStatus	XBee module status
NodeDiscoveryResponseParser
RemoteATCommandRequest	Used to query or set module parameters on a remote device
RemoteATCommandResponse	Response to a RemoteATCommandRequest
RemoteNode	Used to represent a remote XBee node
XBee	Used to represents the local XBee
XBeePacket	Base class to implement XBee API frames (API Operations)
XBeeResponse	Base to create API frames responses