Kcachegrind - Callgrind is a profiling tool and KCachegrind is able to visualize output of the profilers.
strace - Trace system calls and signals. A diagnostic, debugging and instructional userspace utility.
Valgrind - Valgrind is an instrumentation framework for building dynamic analysis tools.
ftrace - A function tracer for the Linux kernel.
dotMemory - dotMemory allows users to analyze memory usage in a variety of .NET and .NET Core applications.
Glimpse for C# - The open source diagnostics platform for the web. Contribute to Glimpse/Glimpse development by creating an account on GitHub.