All of the Android apps that made my fall 2012 "best of" list have a few things in common--besides being worth a download.\n\tThey\u2019re all "social apps," allowing you to organize your Twitter stream, make free calls and send group messages, and dial into conference calls while barely thinking about it. They\u2019re all free. And all of the apps are available for iOS devices, too. (Since my last Android faves roundup, I really wasn\u2019t wowed by any Android-only apps.)\n\tHere are favorite Android apps I tested since July 2012.\n\tImo Messenger\n\tLike imo messenger, plenty of apps corral all of your IM services in one place. In imo\u2019s case, the list of supported services is fairly extensive, and it includes Skype, Google Talk, Yahoo! Messenger, MSN Messenger, AIM and Facebook Chat. Imo messenger lets you make and receive free phone calls over Wi-Fi connections (you can also place calls over cellular connections). These features aren't unique to imo, but the app has a few things that set it apart, including an easy-to-navigate interface, surprisingly good voice quality (for a smartphone app) and the abilities to message from your Android or from the imo website (in text or voice). IMHO, imo messenger is a worthy addition to your Android.\n\tSlices for Twitter\n\tUnlike some other Twitter clients I\u2019ve used, Slices for Twitter neatly organizes tweets from accounts you follow into categories, or "slices." By default, the app comes with pre-defined categories to get you going. But you can create your own, which makes it easier to see what the Twitterverse thinks about, say, technology or health topics at a given time. You can explore tweets by content providers, such as CBS and ABC News, too. Slices for Twitter lets you compose and post tweets. But easy content consumption is where this app truly shines.\n\tMobileDay \n\tAmong the world\u2019s pressing problems: The tedious chore of dialing into a conference call from the road, which ranks somewhere between a sore toe and a missing sock. (Speaking of missing socks, have I got an app for you!)\n\tMobileDay makes the conference-call process as painless as possible. You just launch the app, peek at your calendar and click the conference call appointment. The app enters the necessary dial-in and passcode numbers for you. All you have to do is say something brilliant during the call.\n\tMobileDay also lets you easily fire off text or email messages to others using prepared text, such as \u201cI\u2019m running late\u201d and \u201cIs this meeting truly necessary?\u201d (Confession: I made that one up).\u00a0\n\tYour Android Favorites\n\tHave you tried any new Android apps that you can\u2019t live without? If so, please share the details in the comments section.