KeePassDroid is the mobile version of a very useful open source program, KeePass , which allows you to manage your passwords in a secure and centralized way. With this software, in fact, you can create a password database protected by a single master password or certificate.

Shazam is an application that helps you find out the title of a song, the singer’s and album’s name, or even a TV show, by simply bringing the smartphone closer to the source from where the sound is coming. The app is free with ads, or costs € 4.79 in the Encore version.

SMS Backup & Restore is an app for Android that performs backup and restore of your text/MMS messages. Backups are created locally on the phone, unless you configure the application to send them via email, Google Drive or Dropbox.

WhatsApp Messenger is multi-platform mobile messaging app that allows you to exchange messages with your contacts without having to pay for text messages. It is available for iPhone, BlackBerry, Android, Windows Phone and Nokia. In addition to basic messaging, WhatsApp users can create groups, share unlimited messages, video and audio multimedia messages. Since 2015 WhatsApp can also be used for free phone calls via Internet connection. It’s free for the first year, then it costs € 0.89/year.