Hangouts   Free Google Talk is dead, long live Google Hangouts! This app can not only send instant messages to other Google users, but it can also do video chatting for free. Users lucky enough to have Android 4.4 can also use it manage their SMS messages, and Google+ users can enjoy video conference calls with up to 12 participants.

Viber: Free Messages & Calls   Free Viber distinguishes itself from other free voice and texting apps by adding your computer as a communication device. From your Android, you can seamlessly transfer a voice call to the Viber PC app and keep talking, or pick up a text message conversation already in progress. With a growing list of fans, Viber is well positioned to make talking and texting a little easier (and cheaper).

TextSecure :: Private SMS/MMS   Free If you're worried about the NSA or anyone else peeking at your text messages, consider TextSecure. Messages sent to other TextSecure users are encrypted over the air, but the app will also encrypt all of your text messages when they're at rest on your phone to keep them away from prying eyes. We first reviewed the app when it was in Beta, but it's since had a full version release and is ready for prime time.

RedPhone :: Secure Calls   Free The companion to TextSecure, this handy app lets you make encrypted calls over the developer's secure VoIP network to other TextSecure users. I particularly like that it works with your existing dialer and phone number, alerting you when another RedPhone user is on the line and the call can be encrypted. If all those PRISM and NSA headlines have you worried, be sure to give this app a try.

Wickr   Free Sometimes the most secure message is one that simply doesn't exist. That's the thinking behind Wickr, a fully encrypted, secure messaging service that even handles media messages. The twist is that you set a lifespan for each message, ensuring that your private messages stay private. And, if you doubt their security chops, here's what the company's founder told the FBI when they asked for a backdoor.

Facebook Free Those addicted to the big blue social network can now stay connected at all times thanks to the Facebook Android app. You can use it to browse the entirety of Facebook and chat with other users, and you can also access all the settings available on the website. It's a brilliant mobile adaptation of a sprawling service.

Circle of 6 Free This unique app is for those dangerous situations when you need to quickly (and discreetly) get help from your friends. Two quick taps sends one of three pre-written text messages to as many as six of your contacts. One message sends your GPS location and a request to be picked up, while another asks your friends to quickly get in touch with you. The app also includes links to the RAINN and Love is Respect hotlines.

Plume for Twitter   Free Sure, there are plenty of ways to fire off a 140-character Tweet, but users looking for more control should consider Plume. This powerful Android Twitter client lets you change all sorts of settings, right down to the LED color used to alert you of a message. My favorite feature is muting, which lets you suppress users, and even specific words, from your timeline.

Tumblr Free Tumblr has grown in leaps and bounds since it first came onto the scene, letting users quickly share their creations and discoveries and—most importantly—re-blog things they find on Tumblr. The blogging platform's slick new Android app shows just how far it's come with a great new interface