outlook client

Kommute is a cross platfrom file sharing client using the anonymous network MUTE

Bulk Email Client for Sending Personalized Text or HTML Messages

It's scalable too very high numbers of feeds and can be used in multi-client

Remote File Server / FTP Client, Drag & Drop, Easy Secure Share & Access, FTP

Turbo charged FTP client for Mac OS X with many advanced features

Mercury Messenger (previously called dMSN) is a Java-based MSN client.

Treeview for ASP.NET (client model, ADO.NET, load-on-demand, drag-and-drop, ...)

eMule is a filesharing client which is based on the eDonkey2000 network .

Windows client for Amazon S3 and user Interface for Amazon S3.

S3 Browser is a free client interface for Amazon S3 Service.