Android

If you have an Android phone, here is some software that might be of interest:

Security/Privacy

 * KeePassDroid - Password manager that uses encryption
 * TextSecure - Encrypt SMS
 * DroidWall - Firewall
 * AdFree Android - Requires root, but removes all ads

Performance

 * Only have wifi or GPS on while using it, turn it off asap after use.


 * Advanced Task killer
 * Juice Defender
 * Juice plotter
 * Green power

Samsung

 * Kies Air from Samsung Apps (allows you to exchange content on the LAN through a web server)

Backup
You'll need adb for this. On Debian or Ubuntu: sudo apt-get install android-tools-adb

then you'll want to make a directory to back your files up to: mkdir android-backup

cd into that directory, and start by backing up all your installed applications:

adb backup -all

and now you can also backup your internal sdcard:

adb pull /storage/sdcard0/.

The above assumes you're in android-backup, otherwise replace the. with the directory you want to backup to.