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

Microprocessor Simulator on Linux [ Screenshot tour ]

Microprocessor Simulator on Linux

Features:

• Easy-to-use graphical interface.
• You may use your regular IBM PC to run simulation software that controls real hardware in real time, through the parallel port on Linux.
• An open source (for non-commercial products)and easy-to-use IDE that uses the Qt graphics library to help users build effective designs.

Download the software on sourceforge.net @ Microprocessor Simulator on Linux.

[Source ]