Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
ICARIS - Grant Management Software
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.
Flexi-Grant - Flexi-Grant is a fully customisable grant management system designed to make complex grant-giving programmes easy to manage.
JabRef - Graphical Java application for managing bibtex (. bib) databases.JabRef · JabRef Help · JabRef | Blog · OpenOffice/LibreOffice .
Foundant GrantHub - Pre- and Post-Award Grant Management Software for Nonprofits