Any free and good FX programmes out there?

[FreakWave]

I would like to get into creating FX, are there any free software's which you can create your own FX in video's?

 

[kenrivers]

What kind of special effects would you like to do?
Here is a link to one: http://www.avs4you.com/AVS-Video-Editor.aspx?sct=aff&ct=regnow&cid=175028 I've never used it so I can't verify the quality of the software.
The same goes for this one: http://www.debugmode.com/wax/ but I have just downloaded it.
Here's a link to more free editing programs: http://webseasoning.com/technology/best-free-windows-video-editing-software/1079/