Download of mcu8051ide-1.4.9_all.deb (mcu8051ide-1.4.9_all.deb ( external link: SF.net): 3,596,904 bytes) will begin shortly. If not so, click link on the left.
Integrated Development Environment for some microcontrollers based on 8051(e.g. AT89S8253). Supported languages are Assembly and C. It has its own simulator, assembler, editor and many other tools. See http://mcu8051ide.sf.net for more details.