Grafana - Data visualization & Monitoring with support for Graphite, InfluxDB, Prometheus, Elasticsearch and many more databases
TeamLogger - Simple, employee time-tracking software with automatic screenshots and activity level monitoring. $1 / User / Month.
Prometheus - An open-source systems monitoring and alerting toolkit.
Monitask - Employee Monitoring Software with Screenshots, Internet, Activity and Time Tracking
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Screenshot Monitor - Best tool for remote, office and freelance time tracking to boost your team performance.