https://github.com/joeandaverde/socket.io-csharp-client

http://websocket4net.codeplex.com/

http://www.codeproject.com/Articles/463947/Working-with-Sockets-in-Csharp

https://supersocket.codeplex.com/

https://github.com/rdavisau/sockets-for-pcl

http://www.cs.columbia.edu/~lok/csharp/refdocs/System.Net.Sockets/types/Socket.html

https://github.com/xljiulang/NetworkSocket

https://github.com/kerryjiang/SuperSocket

https://github.com/kerryjiang/SuperWebSocket

https://github.com/kerryjiang/SuperSocket.ClientEngine

https://github.com/NetEase/UnitySocketIO

https://github.com/ihaoqihao/FastSocket.Net

https://github.com/ihaoqihao/Redis.Driver.Net

https://github.com/ihaoqihao/Zookeeper.Net

https://github.com/ihaoqihao/Thrift.Net

https://github.com/ihaoqihao/Riak.Driver.Net

https://github.com/kaistseo/UnitySocketIO-WebSocketSharp

https://github.com/vtortola/WebSocketListener

https://github.com/Dem0n13/AsyncSocketServers

https://github.com/paulbatum/WebSocket-Samples

https://github.com/mxinshangshang/CSharp_MyChat

https://github.com/hanyue1006/ChatRoom

https://github.com/FrankFan/MyChatRoom

https://github.com/SaintCat/SocketChat

https://github.com/nswbmw/N-chat

https://github.com/xskogure/SpeechRecognitionWebSocket

http://www.c-sharpcorner.com/UploadFile/bfarley/SocketChatBF11182005013225AM/SocketChatBF.aspx

http://www.codeproject.com/Articles/12893/TCP-IP-Chat-Application-Using-C

http://www.supersocket.net/

http://supersocket.codeplex.com/

https://github.com/kerryjiang/SuperWebSocket

https://logmaster4net.codeplex.com/

https://github.com/kerryjiang/LogMaster4Net