Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.
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.
LibreOffice - Calc - LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.
JabRef - Graphical Java application for managing bibtex (. bib) databases.JabRef · JabRef Help · JabRef | Blog · OpenOffice/LibreOffice .
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.