DistribuStream is a fully open peercasting system, allowing on-demand or live streaming media to be delivered at a fraction of the normal cost. Content is distributed using segmented downloading similar to BitTorrent, but provided in-order so it can be displayed on-the-fly as it is being downloaded.
DrFTPD is an FTP server written in Java. It does not handle transfers in the same way that normal FTP servers do. Instead, it merges multiple FTP sites into one, creating a distributed FTP site/FTP cluster containing one master and many slaves/nodes. When a client wants to transfer a file from DrFTPD, DrFTPD finds the slave which has the file, and tells the appropriate slave to transfer the file instead of handling it itself. This allows huge gains in total bandwidth and disk capacity.
Docpile is a PHP-based document management system that allows multiple people to share documents and keep track of revisions. Users can upload and download documents, grant per-file, -user, or -folder access privileges, and send notification emails when documents are being updated. Administrators can create access groups, each responsible for a different set of folders and users.
This program hopes to become a viable MS Sharepoint clone. It is basically a Web interface to a document repository (Frontpage Web), but with many other features. It depends on Frontpage extensions for remote authoring; otherwise it is independent. It includes a forum, calendar, event tracking, announcements, tasks, file check in/check out, user management, email, and more.
Dolda Connect is a modular P2P filesharing client built around the Direct Connect model. It supports most of the latest features of the DC protocol. It runs in client/server mode with a well defined protocol, allowing extensibility, flexibility, and multiple detachable user interfaces. It also has an optional multi-user mode.
DragonDisk is a powerful file manager for S3 compatible cloud storage services, such as Amazon S3 and Google Cloud Storage. It allows you to back up, share, and organize your data thanks to an intuitive interface. Features include multiple windows; copy / move between Amazon S3 accounts; a multi-threaded HTTP/HTTPS engine; drag and drop; rename files and folders; filename filters; BiTorrent, time limited, and signed URLs; client side encryption; a metadata editor; ACL inheritance; detailed operations logs; and support for versioning.