Dynatrace Load - Dynatrace Load lets you test the performance of web and mobile applications with the realism of load generation from the cloud.
Microsoft Visual Studio - Microsoft Visual Studio is an integrated development environment (IDE) from Microsoft.
Apache JMeter - Apache JMeter™.
Visual Studio Code - Build and debug modern web and cloud applications, by Microsoft
Sitespeed - Sitespeed.io is an open source tool that helps to analyze and optimize website speed and performance.
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.