Most software for DJ are given for fee because they usually need a controller or interface to work 100%.
There are 2 software that I suggest you checkout.
1.) Rane Serato Scratch Live, I think you can download it free. You also would need the SL2 interface for it to work 100%.
2.) Virtual DJ LE, you can download it free.
As like the Serato Scratch Live, you will need a controller for this to work 100%.
If you mean a USB DJ Mixer, then try some of the freeware DJ programs such as: VIRTUAL DJ; CROSSDJ FREE; CUTEDJ. there are others as well.
DJ Sheepwolf Mixer 4 is the best ive seen yet hopefully they can put better dj games online. Virtual DJ is THE BOMB! but u have to download it on ur compuer but the other cool thing is that u can mix ur own favrite songss! :)
An open source dj mixer is a totally free-of-charge means of editing and controlling the inputs and outputs of audio (and sometimes video) programs.
Free download remix song
There are a number of free DJ mixing software programs that are available for free online. Mixxx, VirtualDJ, and DJ Mixer, for example, are all names of free mixing software programs.
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The Behringer DX626 Pro DJ Mixer Factory B-Stock can cost around $79.00 new. It's a good brand and fairly reasonibly priced.
virtual dj
www.virtualdj.com/ will direct you to the right place to get the software. It is free, and the is a "Free Download" link right in front of you when you enter the website.
Numark products are very rare and difficult to find. An individual who is looking to purchase a Numark DJ Mixer can buy one at Amazon, Best Buy, or the official place of Numark.
You can't
You can download software from the internet which will allow one to be a virtual DJ. However not all software is free and may require a payment in order to license it.