How to get nice transitions between tracks on a mixtape?

[Iwannamix]

Like on ODB's first album you can clearly hear the end of Baby C'mon, At the Beginning of Brooklyn Zoo, Same for Shimmy Shimmy Ya and Baby C'mon. how do I get this effect? What programs best for it.

Ol Dirty Bastard - Baby C'mon - YouTube
Ol' Dirty Bastard - Brooklyn Zoo - YouTube

 

[Massive Master]

Literally *any* decent DAW or PQ editor. I mean, I don't think there's an audio program out there that can't do simple crossfades...