protects against known PDF exploit
local UIKit-based Terminal emulator
fix phone numbers for roaming and locales
enforces support for injecting keypresses
global opt-out of anonymous usage tracking
languages and translations for Cydia
TCP over DNS (unconfigured, just software)
virtual serial port for logging/emulation
smooths iPhoneOS transitions (2.x->2.y/3.x)
reed-solomon error correcting file format