Apache is a free and open-source cross-platform web server software.
Histats is a simple website visitor analysis and tracking tool.
Mailchimp is a marketing automation platform and email marketing service.
ShareThis provides free engagement and growth tools (e.g., share buttons, follow buttons, and reaction buttons) for site owners.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.