Apple isn’t a fan of app discovery applications. It either removes them from the store, or denies new submissions. This means that users don’t have another option for finding applications for iOS devices.
However, Tekiki is web-based. It’s HTML5, and therefore Apple doesn’t have control over the service, because it completely avoids the App Store.
It is designed to help you find apps that are currently available for free. Coding in HTML5 is a way for developers to avoid any of Apple’s rules or restrictions. Pretty cool, actually.
You can check it out here: http://www.tekiki.com
Obviously, you will want to navigate there using your iOS device.