The program Limewire is rly good for other songs but it's not the best for anime and jpop. If you're looking for anime, I'd strongly recommend Gendou's anime musik ^^ link If anda want jpop as well, anda can check out link It also has quite a few anime songs and it's rly awesome too :) Both websites require sign up but I can definitely say it's absolutely worth signing up for either of them, especially Gendou ;) Hope this helps :D
link is a site just for mp3 anime, if anda gabung the site and can make as many downloads anda want, is a Brazilian site, so it's in Portuguese, but just as anda do the cari oleh putting the name of the anime at the bar, not must be hard for anyone not understand the language x3