The number of applications that exist is fairly large so we have not tested all of them. The following is a long list of client applications that we have found that claim to support Modbus TCP communication. LabJacks with Modbus support follow the standard, so any Modbus TCP Client should be able to talk to our devices. Because of this they are compatible with dozens of 3rd-party Modbus client applications.
LabJack T-Series devices are Modbus TCP Server devices.