There are many tools available, but not all are for the same purpose. I will collect here what I tend to use and build know-how on.
Azure Loadtest
https://azure.microsoft.com/en-gb/services/load-testing/#overview
JMeter
k6.io
Gatling
Apache AB
https://httpd.apache.org/docs/2.4/programs/ab.html
SuperBenchmarker
Blogpost SuperBenchmarker for Loadtest