Most of what you need comes preloaded on Kali. If you are working with Kali in specific areas, Kali provides a list of specific categories of tools in the https://tools.kali.org/kali-metapackages page, shown in the following screenshot:
That is a useful data source, but it may complicate your life a little, by forcing you to make choices. There are a few applications we have found useful that are not loaded with the base install. We will also set up and configure OpenVAS for use as our vulnerability scanner.