All nginx modules being used.

gistfile1.txt

For API speed and page responses:
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https://github.com/pagespeed/ngx_pagespeed

Nginx-Access-Plus is a Nginx module allows limiting access to certain http request methods and client addresses.
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https://github.com/nginx-clojure/nginx-access-plus

This module can be used to protect your server in case system load or memory use goes too high.
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https://github.com/alibaba/nginx-http-sysguard

ngx_supervisord is a module that provides API to communicate with supervisord daemon.
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https://github.com/FRiCKLE/ngx_supervisord

This module can be used to update your upstream-list without reloadding Nginx.
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https://github.com/yzprofile/ngx_http_dyups_module

Nginx virtual host traffic status module.
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https://github.com/vozlt/nginx-module-vts

NAXSI means Nginx Anti XSS & SQL Injection.
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https://github.com/nbs-system/naxsi

nginx-systemtap-toolkit - Real-time analyzing and diagnosing tools for Nginx based on SystemTap.
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https://github.com/openresty/nginx-systemtap-toolkit

nginx_http_upstream_check_module - support upstream health check with Nginx.
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https://github.com/yaoweibin/nginx_upstream_check_module

Adds a request queue to Nginx that allows the limiting of concurrent requests passed to the upstream.
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https://github.com/ezmobius/nginx-ey-balancer

Healthcheck plugin for nginx.
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https://github.com/cep21/healthcheck_nginx_upstreams