Download BPM Studio Windows 7 Free

It's an excellent Dj's program which let you mix music in Mp3 format.

VirtualDJ: Is a mixing music program for beginnes and professional Djs.
foobar2000: Is an audio reproducer for advanced Windows systems, compatible with the majority of traditional audio formats.
Fast Audio Converter: Converts different audio formats between themselves. WMA, MP3, WAV, OGG and APE.
Sound Forge: Is a program for edition and audio recording. Professional and at the same time intuitive and simple.
REAPER: Is a powerful multitrack recording, editing and audio mixing software. REAPER has an easy-to-use interface that professionals as well as beginners will be able to use.