Deaf Apps for Android based Mobile Phones

Here is a website that tracks the number of apps for Android based cell phones that people can download. Most of them free with a few requiring a few bucks to download. The site targets apps that, supposedly so, could help deaf and hard of hearing people who have internet enabled Android-based cell phones. What do you think? Have you downloaded any of those apps? Do you find any of apps presented in that website which could be helpful to you? What kind of apps would you like to see on your Android based cell phone that could help benefit you as a deaf or hard of hearing person?