Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
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.
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
JabRef - Graphical Java application for managing bibtex (. bib) databases.JabRef · JabRef Help · JabRef | Blog · OpenOffice/LibreOffice .
Ralpha Image Resizer - High-speed image batch conversion tool