Where to download a good Yahoo! app.?

Can somebody please tell me where I can download a full Y! app.? I've tried alot of sites, but when I download the app. then it's a bookmark (I then have to go on m.yahoo.com on my phone's browser; I don't want that). The app. must be like MXit, Opera Mini, Nimbuzz, Snaptu, etc... Please, giving me a link will help alot. THANX!