Cloudflare is a web-infrastructure and website-security company, providing content-delivery-network services, DDoS mitigation, Internet security, and distributed domain-name-server services.
Stripe offers online payment processing for internet businesses as well as fraud prevention, invoicing and subscription management.
Twitter is a 'microblogging' system that allows you to send and receive short posts called tweets.
UmiJs is a scalable, enterprise-class frontend application framework that supports both configuration and conventional routing while maintaining functional completeness, such as dynamic routing, nested routing, and permission routing.