I am very much interested in making short films. Can you suggest me any software that I can use to edit, add effects to my films. Tell me the websites where I can download it free.
Some more link you might find useful;
7 Free Open Source Video Editors For Linux
Top 5 Tools To Make A Home Movie Online For Free
7 Video Editing Tasks VirtualDub Handles With Ease [Windows]
Pinnacle video spin
VLC movie maker
And if you're on Windows you could try Windows Live Movie Maker. It has improved dramatically lately. Get it here: http://explore.live.com/windows-live-movie-maker?os=other
Well, if you bought a new Mac, I would say iMovie!