Windows Web App Gallery

Gallery Server is a Digital Asset Management and Media Gallery application for sharing and managing photos, videos, audio, and other files over the web. Easily add thousands of files using one-click synchronization feature. Includes built in support for metadata extraction, watermarking, video and audio transcoding, security management, and more. 100% managed code written in C# and ASP.NET 4.5. NEW IN 4.3: Support for replacing the files of existing media assets, updates to third party libraries, and several bug fixes