AngularJS is a JavaScript-based open-source web application framework led by the Angular Team at Google.
Google Cloud Trace is a distributed tracing system that collects latency data from applications and displays it in the Google Cloud Console.
Google Hosted Libraries is a stable, reliable, high-speed, globally available content distribution network for the most popular, open-source JavaScript libraries.
Twitter is a 'microblogging' system that allows you to send and receive short posts called tweets.