Here is a list of all related documentation pages:

CAN library overview
CANopen library overview
CiA standards support
can2udp - CAN to UDP forwarding tool
cocat/cocatd - CANopen cat tools
coctl - CANopen control tool
dcf2c - CANopen EDS/DCF to C conversion tool
Finite-state machines
I/O library overview
C11 and POSIX compatibility library overview
Utilities library overview
Object interface
Callback interface