Windows/Mac/iOS/Android: Finding the best apps in the sea of options can be tricky. Lifehacker's App Directory and Hive Five regularly suggest stellar apps. But if you're looking for software recommendations from the Interwebs at large, Apps & Orange has great potential.
Like previously mentioned AlternativeTo and similar services, Apps & Oranges depends on users to recommend and vote on the apps. Since it's new and in private beta only right now, there's not a whole lot of recommending and voting going on yet.
The site is cleanly designed and well-implemented, however. You can share your search for a particular type of app on your social networks, view app screenshots, read user reviews, and -- coming soon -- get links to reviews of the apps from other sites.
Apps & Oranges is less about finding an alternative to some popular app, like AlternativeTo and OSalt are, and more about finding the kind of app you're looking for. It aims to answer questions like: What's the best to-do app on the web? and What's the best RSS reader for Android? Once you register and login (via Facebook or Twitter), you can pose your own questions to find that specific type of app you're looking for. (This seems like it can get a bit crazy, since users can create any category of apps simply by asking a new question, but sometimes the type of app you're looking for doesn't fit into a cookie-cutter category.)
Apps & Oranges usage is currently by invite only, but 2000 Lifehacker readers can sign up to try the service out via the link below. Let us know what you think.