videomp3.com
cooltoad.com
Song pk
saptasur.net is the best site to download marathi mp3 songs.
http://hippomp3.com is great to download songs and youtube videos...
There are many - depending on what type of songs you intend to download. Few are in the related links section.
Www.Smsmarathi.wapka.mobi
The best site that I know of is liltranscriber. Look it up on google, it is for piano music and it is so good! Its free and has fast downloads. Seriously, it is the best site ever!
Not sure if they have all artists, but the link mentioned below allows you to download song for free and save them right on your desktop.
Israbox.com is a website with MP3 downloads. The site has thousands of songs that you can choose from to download.
The entire site used to have free downloads. Most of the songs you have to pay for now.
jmp3up.com is the best site out there for that.
I think the best one is probably Grabit or NZB matrix I think