Zeppelin (FREE)

Zeppelin is a Cydia tweak that allows you to change your default carrier logo and replace it with a bunch of different logos and little pictures (Where it says "iPod" on your iPod Touch on your status bar, or if you have an iPhone, it says "Sprint" or "Verizon" or whatever carrier you have). There are thousands of different logos and pictures that you can download as addons, or packs avalible via Cydia (The tweak itself comes with 19 already). The packs come with about usually 10-30 pictures/logos that are usually the same thing based on the name of the pack (For example: A pack may be called "NFL Team pack", which features the NFL team logos). There are about hundreds and hundreds of different packs avalible to purchase for free. And Zeppelin itself is free also.

List of logos that come with Zeppelin:
​(There  are much more avalible via the packs in the "Zeppelin addons" section in Cydia)
 * Abstergo logo
 * Android logo
 * Aperture Science (Portal video game)
 * Apple logo
 * Assassin's Creed logo
 * Autobots picture
 * Batman figure/logo
 * Beats by Dre logo
 * A Blue Cloud (I think it's for iCloud)
 * Dark Knight figure/logo
 * Deceptions
 * Infiniti logo
 * Nike logo
 * Pac-Man
 * Space Invaders
 * Storm Trooper
 * Superman logo
 * Triforce
 * Windows

Zeppelin info.

 * Author: Jivhg
 * Free!
 * ID: com.alexzielenski.zeppelin
 * Section: Tweaks
 * Contact: poetic_folly
 * Sponser: ModMyi.com
 * Version: 1.1-1

Changes
The new version of Zeppelin now allows you to change your carrier without having to "Apply and Respring", in result you can change it instantly without having to wait for it to respring.