cydia

Cydia is a package manager mobile app for iOS that enables a user to find and install software not authorized by Apple on jailbroken iPhones, iPads and iPod touch devices. It also refers to digital distribution platform for software on iOS accessed through Cydia software. Many of the software packages available through Cydia are free of charge, although some require purchasing.
Cydia is developed by Jay Freeman (also called "saurik") and his company, SaurikIT. The name "Cydia" is a reference to the moth genus Cydia, notably the codling moth (with a scientific name of Cydia pomonella), which is the proverbial "worm in the apple."

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