Grafana - Data visualization & Monitoring with support for Graphite, InfluxDB, Prometheus, Elasticsearch and many more databases
Worksnaps - Worksnaps is a unique service specifically designed to track time for remote workers, telecommuters and freelancers.
Prometheus - An open-source systems monitoring and alerting toolkit.
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Justworks Hours - Justworks Hours (Formerly known as Boomr) is an online time tracking software that allows you to effortlessly track your employee’s time with automation.