An open source command line tool that gives you access to hundreds of servers around the world to run network utilities such as ping, traceroute, mtr and dig
CDNPerf is a free service to analyze and compare the performance of commercial CDN providers. All data is based on millions of real user metrics (RUM) and pulled from the commercial service PerfOps via their API.
DNS Performance and uptime analytics for all commercial and free DNS providers as well as DNS resolvers
jsDelivr is free CDN for open source projects launched in 2012 and used by thousands of websites. Its built to be a reliable production CDN with multiple failover layers built in. The new updated backend launched 3 months ago allows all users to get files hosted on the official npm registry. e.g https://cdn.jsdelivr.net/npm/jquery@3.2