How Do I Turn Avi To Gif?

i havent got a clue where to ask this. so sorry for it being in the wrong place, but, how do i do it?

http://www.topshareware.com/123-Avi-to-Gif...wnload-2238.htm

http://www.topshareware.com/GIF-and-AVI-Bu...wnload-2263.htm

http://www.imagespro.com/programs/2160/

http://www.klboard.ath.cx/index.php?showtopic=28931

RedRival's avatar guide.

Hope this helps.

Hugo.