Based on experience and ease of use, SlideME is the best, Google it and its come right up. DL from their site straight to your device. Works great for me w/o the headache of modding your device coide for a google market.
I like it too, you an check ur devise compatibility to a certain app and u have the option if you want to redownload and uninstall it too. Also you can see if there's an update to what app you had downloaded before.)