A free program for Android, by D Studio Apps.

DJ Mixer – DJ Music Player is a music player and mixing app for DJs to make awesome mixes. With it, you can create amazing sound effects and remix your favorite songs.

It allows you to mix two songs together and make a new song with a different melody and sound. You can also add effects to make your mix more interesting. 

DJ Mixer allows you to create playlists for your mixes. You can add tracks to the playlists, delete them, or rearrange them.

It comes with an equalizer that allows you to adjust the sound effects for each channel.