Here’s an interesting alternative app store that offers a large collection of curated apps. Mobogenie boasts an intelligent recommendation engine that’s supposed to analyze your preferences and make sensible suggestions. The interface is good, access is offered globally, and there’s no registration. Mobogenie also works as a file manager, and it allows you to download other content beyond apps such as wallpapers, ringtones, books, and YouTube videos.
Nine is a very reliable email client designed to work with all of your accounts. The clean interface and the optional conversation view make reading and replying to email intuitive. One of the coolest features is the ability to customize the notification actions, including an incredibly useful "Mark as read" option. It isn't cheap, but it's only a one-time $14.99 charge for a much-improved email experience that also integrates calendar, contacts, notes, and tasks functionality. Droid Apps
Weather Underground combines a slick design with a focus on really useful weather information. We particularly like the ability to report weather conditions in your area and the extremely useful comparative forecasts that deftly show how conditions have changed since yesterday. With an accompanying set of useful widgets, it's the best weather app on Android. Droid App