Express is a web application framework for Node.js, released as free and open-source software under the MIT License. It is designed for building web applications and APIs.
FullCalendar is a full-sized drag and drop JavaScript event calendar.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
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.
Sentry is an open-source platform for workflow productivity, aggregating errors from across the stack in real time.
Ubuntu is a free and open-source operating system on Linux for the enterprise server, desktop, cloud, and IoT.