If you want to get free apps for the iPhone or iPod Touch, you must first have your iPhone or iPod Touch jailbroken. After that, simply get on Cydia and add the Hackulous repository;
Cydia -> Manage -> Sources -> Edit -> Add
Enter the link “http://cydia.hackulo.us” like the picture below.
Thanks to: Caged Insider :Inside Source on everthing MMA
After adding the source for the Hackulous repository to cydia, the next step is to download theInstallous app for the iPhone or iPod Touch. The Installous app will be your source for apps.
Cydia -> manage -> Packages
From there whether you want to perform a search function or just scroll down and find it, you will have to install the Installous app. The Installous app will be like an alternative to the iPhone appstore.
Once the Installous app is on your springboard, you can use it to find the many apps that are available for the iPhone and iPod Touch. The app will often redirect you to hosting sites via the browser but from there just simply select a mirror and you should be able to enjoy the apps free.