Mendeley - Easily organize your papers, read & annotate your PDFs, collaborate in private or open groups, and securely access your research from everywhere.
Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.
Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
LibreOffice - Calc - LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.
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.
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.