FileProInfo - It's All About Files, Software, Online Tools - 100% Free
Microsoft Visual Studio - Microsoft Visual Studio is an integrated development environment (IDE) from Microsoft.
File-Extensions.org - Large computer file extension library with detailed explanation of each file type with links to download free or associated software programs.
Visual Studio Code - Build and debug modern web and cloud applications, by Microsoft
GroupDocs - GroupDocs is a web-based service for online document sharing, collaboration and management.
Xcode - Xcode is Apple’s powerful integrated development environment for creating great apps for Mac, iPhone, and iPad. Xcode 4 includes the Xcode IDE, instruments, iOS Simulator, and the latest Mac OS X and iOS SDKs.