From time to time I like to spread the word for nice software that I use. As I wanted to write my own API client based on Electron, I have found Insomnia. And it has mostly every feature that I expect from an API client. Give this application a try if you build APIs every day and if you want to get rid of API client web browser plugins.
Kali Linux is a cool Linux distribution with a lot of security tools preinstalled. To run those security tools agains a local webserver for example it would be nice and handsome as VirtualBox. Offensive VirtualBox images are also available at offensive-security.com, but creating your own custom image is also pretty easy.