Pidgin - Pidgin is an easy to use and free chat client used by millions. Connect to AIM, MSN, Yahoo, and more chat networks all at once.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Adium - Adium is a free instant messaging application for Mac OS X that can connect to AIM, MSN, Jabber, Yahoo, and more.
Datadog - See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.
Gajim - Full featured and easy to use Jabber client
Prometheus - An open-source systems monitoring and alerting toolkit.