1) Bitdefender 
Take Bitdefender’s award-winning antivirus protection with you! Bitdefender's Antivirus Free is a powerful and fast solution that uses in-the-cloud scanning technology to arm your Android device with the very latest industry leading virus detection. Without slowing down your Android or draining your battery. Simply install on your Android and it’s ready to go—nothing to configure. And it's totally free! Unparalleled Detection Autopilot automatically scans any new apps that are downloaded to your Android device for viruses. Antivirus Free uses the same scanning engines as Bitdefender Mobile Security-our flagship mobile security app that has been independently certified to catch more than 99% of all viruses targeted at Android devices. This powerful scanner keeps you protected 24/7 against malicious activities.
2) Avast 
Protejati-va telefonul si tableta Android™ cu aplicatia gratuita de securitate pentru dispozitive mobile cu cele mai bune evaluari (4,6 stele!), care ofera atât protectie antivirus, cât si Anti-Theft. ¦ avast! Mobile Security va protejeaza dispozitivul împotriva virusilor, a programelor daunatoare si a programelor spion. ¦ Va ajuta sa localizati un telefon pierdut cu ajutorul caracteristicii web de localizare a telefonului. ¦ Blocarea si/sau stergerea de la distanta a memoriei dispozitivului din cadrul componentei avansate Anti-Theft mentin siguranta datelor. ¦ Cu ajutorul instrumentelor utile, cum ar fi contorul de retea, managerul de aplicatii si chiar si firewall-ul, aveti control total asupra telefonului mobil. Instalati aplicatia astazi – complet GRATUIT. Milioane de oameni au încredere în aceasta aplicatie, recomandata de cei mai prestigiosi reprezentanti din domeniul aplicatiilor Android: ? AndroidAuthority: „Cea mai buna aplicatie a devenit si mai buna… nu se compara cu nicio alta aplicatie de pe piata.” ? Android and Me: „Cea mai buna solutie Anti-Theft de pe piata.” ? AndroidPolice: „Solutia completa de care aveti nevoie daca va pierdeti dispozitivul sau va este furat.”
3) Dr.Web 
Dr.Web for Android Light Basic protection from viruses Attention! To protect your mobile device from all types of malware created by criminals, use comprehensive protection — the Light version is not enough. Features and Advantages • Quick or full file system scanning, as well as custom scanning of files and folders specified by the user. • Real-time file system scanning with SpIDer Guard monitor whenever attempts are made to save files to the device’s memory. • Detects new, unknown malware using the unique Origins Tracing™ technology. • Protects the SD card from becoming infected with autorun and Exploit.Cpllnk files, which can be dangerous for devices running Windows. • A quarantine to which detected threats can be moved and from which files can be restored. • Minimal impact on OS performance. • Careful use of battery resources. • Small-sized virus database updates to save traffic, which is especially important for users with limited mobile phone plans. • Statistics on detected threats and actions performed. • Handy and informative desktop widgets to access the application.
4) AVG 
Free, top-rated, real-time antivirus and anti-theft protection for Android™ devices. AVG AntiVirus FREE for Android™ protects you from harmful viruses, malware, spyware and text messages and helps keep your personal data safe. Download Free Now! ?? Or take advantage of our limited time Holiday Season offer – 40% off our full-featured premium app: http://bit.ly/avgSP2013HolS Now just $8.99! (USD) ?? Over 100,000,000 people already installed AVG’s antivirus mobile security apps. Join them now and: ? Scan apps, settings, files, and media in real time ? Enable finding/locating your lost or stolen phone via Google Maps™ ? Lock/wipe your device to protect your privacy ? Kill tasks that slow your device ? Browse the web safely and securely ? Monitor battery, storage and data package usage AVG AntiVirus FREE – mobile security software for Android. Quick & easy protection for your phone! With the AVG Android app you’ll receive effective, easy-to-use virus and malware protection, as well as a real-time app scanner, phone locator, task killer, app locker, and local device wipe to help shield you from threats to your privacy and online identity.
5) Kaspersky 
Kaspersky Internet Security for Android delivers the latest mobile security technologies – including superior anti-theft protection and Android antivirus. All the great features of Kaspersky Mobile Security and Kaspersky Tablet Security are now available in a single easy-to-use solution that is optimized specifically for smartphones and tablets. Core, essential protection is absolutely free, just as it was in Kaspersky Mobile Security Lite – but now it has even more security features: • Kaspersky Lab’s latest protection technologies against viruses, spyware, Trojans and more • An Antivirus Scanner - runs an on-demand malware scan of your device • Advanced Anti-Theft Protection – Lock&Locate, Wipe, Full wipe, Mugshot. Plus: • A new ‘Alarm’ feature has been introduced – you can remotely sound the alarm, helping you to find your device if it is somewhere nearby. The alarm works even in ‘silent’ mode. • Anti-Theft Web Management Portal. Using a personal online account you can manage all the anti-theft options from a single point. • Call&Text Filter for smartphones – protects you from unwanted calls and text messages