ecoDMS - ecoDMS GmbH offers archiving software for everyone. Learn more and find the archiving solution that best suits your needs here.
Mendeley - Easily organize your papers, read & annotate your PDFs, collaborate in private or open groups, and securely access your research from everywhere.
M-Files DMS - Document Management System (DMS) with unmatched ease of use. M-files system improves workflow and securely control content. Download free trial!
Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
Paperless-ngx - paperless-ngx has 6 repositories available. Follow their code on GitHub.
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.