Microsoft Whiteboard - The canvas where ideas, content, & people come together.
Nifty - Manage projects, work, and communications in one place.
Greenboard - Generate beautiful static api documentation
Flow - Stop managing projects from your inbox.
DevDocs - Open source API documentation browser with instant fuzzy search, offline mode, keyboard shortcuts, and more
Workflow86 - All-in-one platform for automating complex workflows and business operations