This is Essie - Splash of Grenadine from Essie's Resort - Summer 2010 collection. You can still get it at Walgreens and TransDesign though. I love this color and I really like the finish of Essie Polishes, you don't really need a topcoat because they dry very glossy. It definitely looks better with a topcoat though. I usually wear this one with a Matte Topcoat. China Glaze Matte Magic on two fingers and Seche Vite Fast Dry Top Coat on the other two. If you're looking for a Matte top coat, Essie and Orly have them too. You can get them at Sally Beauty Supply, Ulta and the Essie matte coat is available at Walgreens and Target as well.
Essie - Splash of Grenadine - $4 at TransDesign or $8 Walgreens.
China Glaze - Matte Magic - Sally Beauty Supply/Ulta