HTTrack - HTTrack is a free (GPL, libre/free software) and easy-to-use offline browser utility.
Microsoft Visual Studio - Microsoft Visual Studio is an integrated development environment (IDE) from Microsoft.
WebCopy - Cyotek WebCopy is a free tool for copying full or partial websites locally onto your harddisk for offline viewing.
Visual Studio Code - Build and debug modern web and cloud applications, by Microsoft
GNU Wget - GNU Wget is a free software package for retrieving files using HTTP(S) and FTP, the most...
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.