Finding SSL Certificates

Amar- has one repository available. Follow their code on GitHub.

An open source intelligence tool to crawl the graph of certificate Alternate Names

Free CT Log Certificate Search Tool from Sectigo (formerly Comodo CA)

Instantly search Certificate Transparency logs for a domain's SSL certificates using a JSON API

The Stanford Internet Research Data Repository is a public archive of research data about the hosts and sites on the Internet.

Offering researchers and partners access to data from Project Sonar, which conducts internet-wide surveys to gain insights into global exposure to common vulnerabilities.