FileProInfo - It's All About Files, Software, Online Tools - 100% Free
AppConvertly.com - AppConvertly - convert your website to Android & iOS app. No coding required. Easy solution to reach new audience in 5 minutes https://www.appconvertly.com/
File-Extensions.org - Large computer file extension library with detailed explanation of each file type with links to download free or associated software programs.
Median.co - Median.co (formerly GoNative.io) is the industry leading solution used to build iOS and Android webview apps. Get started for free and turn any website into a full-feature mobile app in seconds.
FileInfo.com - FileInfo is the central file extensions registry and contains a database of over 10,000 file types.
Website 2 APK Builder - Convert your HTML, CSS, JS and all other web content into an Android App within seconds.