Cydia - An alternative app store for jailbroken devices.
Enhancer for YouTube - Tons of features to improve your user experience on YouTube™!
Zestia - Zestia is a mobile app designed to assist you in organizing your hectic schedule, social life, and professional persona.
ImprovedTube - Allows you to improve and enhance Youtube visually or enable dozens of new features permanently or...
JazzMyApp - Let JazzMyApp surprise you with amazing apps everyday. Try it out yourself.
Iridium by ParticleCore - Iridium is an extension built to improve the user experience on the new YouTube Material layout.