You'll find Cydia™ right there on your iPhone after you jailbreak your iPhone. Using it is easy - browse the categories, check what's new, or peruse the featured section to see the current popular apps. There's thousands of themes to choose from.
Cydia™ is Debian APT on the iPhone. Think AppStore, but with packages you could never get direct through Apple. Created by Jay Freeman (saurik), Cydia™ is a feature-rich AppStore competitor. Full themes to completely make over your iPhone's look are available through WinterBoard. Running applications in the background is possible using Backgrounder. You can share your iPhone's 3G connection with your laptop using MyWi, or get notified in your status bar of new mail and texts using Status Notifier. Take complete control of your iPhone with SBSettings.
What are you waiting for? Its time to install Cydia apps. Below is the list of Jailbreak applications compatible with iPhone 4, you must have:-
IntelliScreen - IntelliScreen is one of the best jail-broken Cydia apps that provide functionality most anyone would expect would be available by default on their iPhone. IntelliScreen brings your calendar, e-mail, news, sports, weather and text messages to the “Slide to Unlock” Screen. Initially the screen can be slow to populate, but it’s still the best use of the Lock Screen.
Infinifolders - It allows Jailbroken iOS 4 folders to go on forever, Infinifolders bypass Apple’s limitations of 12 apps in a single iOS 4 folder and allow you to put inside a folder as many apps as you want, choose the color of the scroll bar and even paginate the folder. Do not place folder inside folder as it may be disastrous.
SBSettings - Provides you with an instant access to settings that disable and enable services like Wi-Fi and GPS. SBSettings is a customizable launcher that overlays a menu containing basic functions of the system “options” menus. Accessing this menu is darn easy! Just swipe the bar at the top of the screen with the time and contains things like Reboot, Respring, 3G, Wi-Fi, and other switches to turn things on and off. Now you must admit that SBSettings is a must have app on your iPhone 4.
My3G – It makes Apps believe that they are on WiFi instead of 3G and let you make and take FaceTime calls over 3G (no Wi-Fi required) on your iPhone 4, Jailbroken with JailbrekMe. With My3G, you can now also watch HD YouTube videos, use Skype or Fring or other VOIP apps over the 3G network. Good alternative to 3G unrestritor.
MyWi 4.0 - It allows you to create a WiFi HotSpot to share 3G connection with other PCs and devices such as iPhone. In other words, MyWi turns your iPhone into a WiFi router. You can connect your laptop or other mobile device to your iPhone easily. MyWi has been rebuilt from scratch to bring tethering support to iOS 4 and will work with all jailbroken iPhones.
SpringFlash - It is a springboard Activator-based application that takes advantage of the iPhone 4 LED Flash to serve as a flashlight. You can have a touch of a button for a bright LED flashlight without hassling with unlocking your iPhone, closing your app, or even turning on your screen. To install SpringFlash, you need to jailbreak your iPhone 4.
MxTube - It is iPhone first native YouTube Video downloader for watching then offline later. Works flawless on iOS 4.x jailbroken iPhone.
Source: Gadgets DNA.com
