Free tool to discover possibly forgotten subdomains with issued certificates.

Some domains might need to get submitted in a few repeated attempts, since the public CT logs registries are very overloaded, and Tidelock is trying to pick the most accessible one, without caching anything, so the provided report is always up-to-date with live information.

I will be grateful for any feedback regarding this tool, or in general any SSL/DNS related tools you would appreciate in your daily work.