Apache is a free and open-source cross-platform web server software.
Debian is a Linux software which is a free open-source software.
Google Ads Conversion Tracking is a free tool that shows you what happens after a customer interacts with your ads.
October is a free, open-source, self-hosted CMS platform based on the Laravel PHP Framework.
reCAPTCHA is a free service from Google that helps protect websites from spam and abuse.