Zabbix - Track, record, alert and visualize performance and availability of IT resources
Statista - The Statistics Portal for Market Data, Market Research and Market Studies
openITCOCKPIT - openITCOCKPIT is a leading open source monitoring framework based on Naemon (Nagios). In addition it integrates Checkmk and Prometheus. It also offers interfaces to Icinga2, PRTG and opManager to obtain status and performance from them.
Displayr - Displayr is a data science, visualization, and reporting platform for everyone.
Nagios - Complete monitoring and alerting for servers, switches, applications, and services
Statwing - Simply upload your spreadsheet or dataset, then select the relationships you want to explore. Statwing was built by and for analysts, so you can clean data, explore relationships, and create charts in minutes instead of hours.