RTL-lwIP is the porting of the lwIP TCP/IP stack to RTLinux-GPL.The focus of the RTL-lwIP stack is to reduce memory usage and code size, making RTL-lwIP suitable for use in small clients with very limited resources

RTAI-XML is an XML fr a mework for RTAI rtlinux. It is used to develop XML based applications using JAVA front end tool and RTAI is an backend tool. It is basically worked with the concept of Client-server method.