Apache is a free and open-source cross-platform web server software.
Cloudflare Browser Insights is a tool that measures the performance of websites from the perspective of users.
Open Graph is a protocol that is used to integrate any web page into the social graph.
reCAPTCHA is a free service from Google that helps protect websites from spam and abuse.
Sendinblue is an email marketing solution for small and medium-sized businesses that want to send and automate email marketing campaigns.