As part of my job, I report a lot of phishing sites. This gets very annoying very quickly.
As well as reporting to SafeBrowsing, etc. for each site you also need to look up the domain registrar and hosting provider (via WHOIS) and email them.
Rather than do this manually every time, I wrote a small CLI to automate the lookups and even open pre-templated emails: https://github.com/bradleyjkemp/abwhose
I'm now redoing this as a web app so that I can do the entire reporting process without leaving the browser: https://phish.report
Kinda fun trying to "speedrun" the process down to as few clicks as possible.