Docutain - Digitize, manage and find documents efficiently. With Docutain, your smartphone not only becomes a scanner, but you also get a complete and secure document management system including a QR code scanner.
Mayan EDMS - Document management without the headaches.
Zoho Notebook - The most beautiful note-taking app across devices.
MS SharePoint - Share, organize, and discover information with Microsoft SharePoint. Learn about SharePoint Online, OneDrive for Business, and Apps for SharePoint
Jrnl.sh - Collect your thoughts and notes without leaving the command line
SeedDMS - SeedDMS is an open source document management system based on PHP and MySQL.