Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
Tomato Timer - TomatoTimer is a flexible and easy to use online Pomodoro Technique Timer
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.
Tasklog App - Tasklog App is an agile productivity software designed to meet the needs of current world freelancers.
JabRef - Graphical Java application for managing bibtex (. bib) databases.JabRef · JabRef Help · JabRef | Blog · OpenOffice/LibreOffice .
YAPA - Pomodoro timer