ScreenTray - A better way to capture, annotate and share screenshots
Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
Weava - Workspace to highlight, organize & collaborate on your research articles.
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.
Marker.io for Slack - Turn screenshots into Slack messages ✌️
JabRef - Graphical Java application for managing bibtex (. bib) databases.JabRef · JabRef Help · JabRef | Blog · OpenOffice/LibreOffice .