Apache is a free and open-source cross-platform web server software.
Bookeo is a cloud-based booking and reservation solution that caters to tour operators, travel agencies, schools, therapists, photographers and event organizers.
RequireJS is a JavaScript library and file loader which manages the dependencies between JavaScript files and in modular programming.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.