NetDocuments - The Leader in Cloud-based Document & Email Management

Documize - Enterprise-grade wiki and knowledge management platform

iManage - iManage started its services as document and file management and later on started to store contents as well and to let the businesses to store their files and data for a specified period.

HackMD - Fast and flexible, real-time collaborative markdown, inspired by Hackpad.

MS SharePoint - Share, organize, and discover information with Microsoft SharePoint. Learn about SharePoint Online, OneDrive for Business, and Apps for SharePoint

ReadTheDocs - Spend your time on writing high quality documentation, not on the tools to make your documentation work.