Kcachegrind - Callgrind is a profiling tool and KCachegrind is able to visualize output of the profilers.
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
Valgrind - Valgrind is an instrumentation framework for building dynamic analysis tools.
Lumar - (Previously DeepCrawl) Hosted SEO spider to analyze and find problems with websites.
dotMemory - dotMemory allows users to analyze memory usage in a variety of .NET and .NET Core applications.
Website Checker Tech - WebsiteChecker.Tech is SaaS tool that detects SEO and availability issues of your website, making it easier for you to fix them.