Apache is a free and open-source cross-platform web server software.
Linkedin Ads is a paid marketing tool that offers access to Linkedin social networks through various sponsored posts and other methods.
Progressive Web Apps (PWAs) are web apps built and enhanced with modern APIs to deliver enhanced capabilities, reliability, and installability while reaching anyone, anywhere, on any device, all with a single codebase.
SmtpJS is a free library you can use for sending emails from JavaScript.
Ubuntu is a free and open-source operating system on Linux for the enterprise server, desktop, cloud, and IoT.