Free realistic simulation software for windows

Caerfai Chemical Simulation is a simple tool that is trying to simulate chemical reactions.
The model is much too simple to be useful, but it gives some nice images and animations. Source is included and offers a nice starting point for similar endevours.
Every atom in the simulation is a moving ball which bounces on other atoms and the edges of the window. Atoms can bind to each other, similar to how things work in reality. Well start out with just radicals and build molecules from there. In reality, this is pretty much where it stops, but I break up the molecules everytime they bounce, in order to create more interesting structures. Less chemical, but more fun.
Breaking up the molecules when in reality they would break, would complicate the program a lot beyond the current few hundred lines and anyway, the reaction would occur almost never, as it happens in reality (but there the molecules go so fast that it seems quite quickly, especially if your sleeves have gotten on fire)

Infomatist - Business Simulation Game 1.0.0.1 is designed as as online Web based business simulation game. The energy status is a very important element for player.

Major Features:

1. Be free
2. Notify the player's energy status every 10min without staying on the game Web site.

Enhancements: includes unspecified updates.

Requirements: Windows 2000/XP/2003 Server

ASCII protocol simulation plugin will allow Advanced Serial Port Monitor to simulate the devices, built on principle "request-response". Where each request, coming to ASPM is ASCII string.
At reception of such request module compares it with given request, and at coincidence refers the answer. You can save, load and create request and responses to/from file. By means of such files are easy emulated.

Simulation Wizard 3.03 is a powerful and easy-to-use computer program designed for defining, validating, communicating, running, and analyzing a discrete event simulation model. Simulations are useful in various industrial disciplines. Its totally new approach helps the user in various steps of a simulation project (US patent pending). Opposed to other simulation programs, its use and its output are as simple as those of a word processor.

Enhancements:

• Has correcting misplaced remarks, correction of deleting symbols, correction of situation when erasure of list of additional tasks is done through control box, and correcting update of scalar values in assignments.

YS Flight Simulation System 2000 20060828 offers users an all-in-one lightweight flight simulator. As well as basic functionalities, it has network feature that allows you to fly with or against your friends. You also can fly a formation leader, dogfight, intercept, attack ground, take off and land on an aircraft carrier and so on, and you can choose your airplane from more than 50 airplanes, and there are several maps as well.

Version 20060828 adds new airplanes, landing practice mode, and missions. It also provides key word search in the airplane selection screen (Ctrl+F), in every view mode, the user can zoom/unzoom by mouse wheel, "Use dead zone" option in the joystick assignment dialog, a functionality can be assigned to a joystick axis or a button by moving the axis fully up and down or pressing the button, when flying with a recorded airplane, the user can continue flying after the flight record is over, the server can choose whether an airplane far away and low is shown on the radar or not, new airplanes: Airbus 300, 320, Boeing 737, Avro Lancaster, Hawker Hurricane. This version fixed some bugs and added minor improvements.

MODBUS ASCII/RTU master and slave simulation plugin operates as a MODBUS master or slave device in either RTU or ASCII transmission modes.
The plugin may be used to access and modify data points contained in one or more MODBUS slave devices connected to the PC via a serial port. MODBUS plugin supports the standard MODBUS message types 01-06, 7,8,11,12, 15 & 16, 17, 22 as well as providing the ability for you to exercise special features of a slave device by transmitting custom command strings and observing the response.
MODBUS Plugin is a useful test and diagnostic tool for verifying the proper slave response to MODBUS queries.