Free really easy software for windows

Really is a 2D virtual world where you can put objects and watch them interact (fall, rotate, crash etc.. ). This isdone by simulating the movement of the objects over time and space at atomic level. Perfectly suited for educationalpurposes and for simulations fans.

Really Slick Screensavers is primarily a collection of eye candy. The various libraries included in this project may be used for the creation of other screensavers or to support other software projects.
Installing:
Extract the files from this .zip file using your favorite zip
program (you should have already gotten that far or you wouldnt be
reading this).
Place the .scr file(s) in the directory containing all your other
.scr files. This directory varies between versions of Windows, but
its probably something like "WindowsSystem32"
Open your "Display Properties" window by right-clicking on your
desktop background. Click on the "Screen Saver" tab and select your
new screensaver.
Keyboard controls for all savers:
s - Toggle statistics
Extra controls for Skyrocket:
Skyrocket has the following special controls.
f - Pause the fireworks (particle physics stops updating)
g - Slow motion fireworks (slows down the particle physics)
c - Pause the camera (camera stops moving)
n - New camera view
m - Toggle mouse camera control
Left mouse button = accelerate
Right mouse button = deccelerate
types of explosions to launch:
1 - Sphere
2 - Split sphere
3 - Three-colored sphere
4 - Ring
5 - Double sphere
6 - Sphere and ring
7 - Streamers
8 - Meteors
9 - Streamers and little sphere
0 - Meteors and little sphere
q - Streamers inside sphere
w - Meteors inside sphere
e - Cluster of sphere explosions
r - Cluster of streamer explosions
t - Cluster of meteor explosions
y - Little firecrackers
u - Bees
i - Loud boom
o - Spinner