Free 8051 Resources on the Net

• SDCC - Free C Compiler
• A couple free Visual App Builder by Barry Kauler
• LCD Display interface instructions and examples.
• Yasmin - a free linux-based 8051 simulator, by Gwenn Englebienne
• Web51 8051 based ethernet board using Realtek RTL8019 chip, free asm source code w/ TCP/IP.