Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Qiqqa - Qiqqa is a free research and reference management software. It can be used in many organizational projects from the academic to the personal to the business endeavor. Read more about Qiqqa.
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.
JabRef - Graphical Java application for managing bibtex (. bib) databases.JabRef · JabRef Help · JabRef | Blog · OpenOffice/LibreOffice .
Prometheus - An open-source systems monitoring and alerting toolkit.