If you received a distribution of the RTI Connext DDS libraries and utilities under the RTI Non-Commercial and Pre-Commercial License, you may use the software at no charge for academic, research, evaluation and personal use. You may not use it for commercial or production development. You can find the license terms here or in the file RTI_LICENSE.TXT in the software distribution.
RTI also provides free-of-charge tools for qualified non-commercial use. These tools significantly ease system debugging, integration, testing and optimization. To request a tools license, please submit the form to download an evaluation and indicate “Research and non-commercial use” as the license type. You will immediately receive a 30-day evaluation license. When an RTI representative contacts you, reply that you have a Non-Commercial License.