BitMeex it's a Djing/Mixing VSTi Software that runs inside a DAW or VSTi Host.
BitMeex simulates 2 decks with basic features enough to mix your songs. This software only runs .wav and .aif files and is designed for beginners.
The MIDI can be mapped by "right-clicking" a control of BitMeex and turn the MIDI control of the controller.
For now, BitMeex is only distributed as 32-bits version for Windows, but a 64-bits version is being thought.