Few microprocessor tools you might be interested in

jSimDOP
This project is application based on NetBeans api providing simulation of DOP microprocessor.

Microprocessor USB Firmware
USB Firmware and Drivers for Microprocessor and 8/16 Bit Home computer.

PIC Microprocessor Simulator on Linux
Microprocessor simulator for the PIC16F84A on Linux using a GUI to allow for easier programming and debugging of PIC applications.
Features :

• memory viewer,
• browser
• register editor and mapping PIC pins to parallel port for real world interfacing.

Find more microprocessor related tools here