In Microsoft's journey to make Office an open developer platform, the company has taken the next step by making the Excel REST API generally available. Now developers can integrate the business productivity tool with third party services like accounting software, emails, surveys, etc.
Slack has recently announced several upgrades to it’s messaging platform, these upgrades aim to improve communication inside larger organizations. These new enhancements include a new API for creating templated workspaces and a new announcement channel for communicating key information.
A summary of discussions from OKFestival on open data business models reveals a strong commitment to fostering an ecosystem, while many startups commence with a composite model with multiple revenue streams.