TSNPeerNetworking.
TSNPeerNetworking is released under an MIT license, meaning you're free to use it in both closed and open source projects. However, even in a closed source project, please include a publicly-accessible copy of TSNPeerNetworking's copyright notice, which you can find in the LICENSE file.
If you have any questions, suggestions, or contributions to TSNPeerNetworking, please contact me.