We highly recommend the 8051 Kit with Crossware Development Suite. This is the most complete and powerful 89C51 starter kit we've seen to-date. The software package includes an ANSI C compiler (4k max code size), assembler, simulator, debugger, code creation wizards and IDE. The board includes a header connector and cable that allows its use as an in-circuit debugger. The kit supports programming of Atmel T89 devices via a high-quality zero-insertion-force DIP socket and comes complete with an universal (110V...230V) power supply.