GroupDocs.Annotation for .NET is a downloadable library that allows developers to add cross-platform, multi-format document annotation functionality to any web-based app or site. Recently we’ve created an add-on specifically for Concrete5 users to make it easy to integrate the library into their websites. The add-on has been approved by Concrete5 admins and is now available for download from the official Concrete5 marketplace. How can Concrete5 site owners and developers benefit from this release?...formats include: PDF and Microsoft Word documents, Excel spreadsheets...spreadsheets, PowerPoint presentations, Visio diagrams, CAD drawings...