DJ Software

FL Studio was always my fav. I'm not sure what specifics you are looking for.

"FL Studio is the most complete virtual studio currently available. It will play any sample file (wav), generator (softsynth, VSTi & DXi) or midi instrument you feed it."

The demo is free.
 
[Ok thanks! I think that software is mroe into producing. it has some nice features, but I am looking for something to have a mixer/effects (some samples would be good) of course your crossfader, if possible some filters. Just some program so that I could mashup some tunes and have fun, I used some programs from Magix or Virtual DJ in the past, to give you an idea. I know there is a few of them, but I don't know them. If you/anyone could post some names, I would do a research :)