Cakewalk is actually pretty good, but it has soooo many hurdels to over come, and the frustration can affect your creativity... but after a while, you get to know your way around, and use what you need, and it's cool..

I think the newer version's of sound forge can also do multi tracking, I mean the early version were fantastic, they had loads of options, and you could easily reverse pieces and stuff like that...
All the above are not free (i know you said you wanted to know of anyfree ones... but I dont know of any :()