Meetup page http://www.meetup.com/NGINX-Meetup/events/228383919/
HTTP/1 and HTTP/2 side to side: https://http2.nginxlab.net/
W3Techs HTTP/2 usage stats: http://w3techs.com/technologies/details/ce-http2/all/all
Can I use...: http://caniuse.com/
Let's Encrypt: https://letsencrypt.org/
Web page test tool: http://webpagetest.org/
Wikipedia: https://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol
HTTP/2 FAQ: https://http2.github.io/faq/
Benchmark template - BCORE Admin: https://binarytheme.com/
NGINX HTTP/2 Whitepaper [PDF]: https://www.nginx.com/wp-content/uploads/2015/09/NGINX_HTTP2_White_Paper_v4.pdf
NGINX Blog - 7 tips for faster HTTP/2 performance: https://www.nginx.com/blog/7-tips-for-faster-http2-performance/
Mercurial page for NGINX code http://hg.nginx.org/
NGINX Github page https://github.com/nginx/
Datadog NGINX integration http://docs.datadoghq.com/integrations/nginx/
NGINX Plus developer licenses (password=nginx+datadog) https://www.nginx.com/developer-license