Networking ToolKit (NTK) is a plugin that allows you to implement TCP and UDP socket network communications within your 4D applications.
With this plugin you can add powerful networking capabilities to your application like:

• Add a telnet interface to your 4D application for remote administration.
• Invoke remote methods for distributed processing.
• Automatic discovery of network services.
• Add chat functionality within your applications.
• Communicate with any TCP enabled device such as printers, barcode scanners or laboratory equipment over a network.
• Implement client or server functionality for protocols such as HTTP, XML/RPC, HL7, SMTP, POP, DNS etc.

Here is a short list of the available features:

• An easy to use command set.
• High performance, non-blocking sockets.
• TCP/IP client and server sockets.
• Advanced SSL support with server-side and client-side verification.
• Statistics information on server sockets
• UDP client and server sockets supporting unicasting, multicasting and broadcasting.
• A rich set of IPC commands (inter process communication).
• System debugging and logging tools
• Works with 4D 2003 running on Mac OS X 10.4 or higher. On Windows 4D 6.7 or higher is required running on Windows 2000, XP or Vista.
• Compatible with 4D v11 SQL

NTK Plugin has a very simple licensing scheme:

€ 400 per platform (Mac or Windows)
€ 600 if both platforms are purchased at once (Mac and Windows)

Both licenses allow unlimited deployment.

Version 1.1.3 is now available!

Click on the following links to download a demo version of NTK Plugin.

NTK Plugin for Mac

NTK Plugin for Windows

Please note that the files in these archives are the same.
The only difference is the packaging (.dmg versus .zip).