DashMachine is a free & open-source webapp for putting all of your existing webapps, pages, and bookmarks in one place.
linux open-source free commercial visualization
Instrumental is a real-time, high-scale application and server monitoring tool with intelligent alerts, a powerful query language, and free development accounts.
linux windows oxs free metrics commercial metrics monitoring visualization php ruby python net java nodejs
Amplify is free monitoring tool for NGINX. Amplify offers extended NGINX metric collection, visualization, monitoring, and a static analyzer for NGINX configuration. It's simple to set up, yet powerful enough to bring the much needed insight into NGINX performance. Amplify is a SaaS developed and operated by Nginx, Inc. Keep NGINX up to date and secure with a native monitoring solution.
linux bsd free commercial logging monitoring metrics visualization security hardening errors
'ntopng' provides an easy to understand, intuitive interface with a world of options and features to monitor your network.
linux bsd solaris open-source free commercial networking metrics