deadaim it's actually an add-on type thing, you install aim, then install dead aim. it has some nice features, tabbed windows, no adds, cloneing more customizable buddy list, transparency. they charge $5 if you buy it off their site, i believe they let you upgrade to new versions for free but not positive, but this is easily solvable with a little kazaa work.
http://www.jdennis.net/index.php