比较好的文件传输的源代码，基于winsock，这种文件传输思路非常好，在做P2P时也可以用到，简单直观。-Better file transfer the source code, based on winsock, this file transfer is very good idea, doing P2P can also be used, simple and intuitive.

P2P聊天工具，挺好用的，功能简单，适合实验作业使用-P2P chat tools, very easy to use, simple functions