Plug-ins include Color 4D and File Toolkit for 4D.

LDAP4D implements the LDAP C API in a 4D sort of way. It allows 4d applications to perform LDAP client operations.

ASG is the developer and/or publisher of several 4D plug-ins.

Develops and markets 4th Quarter Accounting Solution (4Q) a multi-user accounting system for small to mid-sized businesses.

4D Office: Connect MS Office and 4D; 4D TAPI: interfaces 4D with phone systems

Committed Software is the publisher of SanityCheck, DataCheck, Method Maddness, AutoDoc, and 4D Version Control software tools. It also publishes "Training Guide: Getting Started 4D".

Foresight Financials offers world-class accounting, management, sales/marketing and inventory modules in one, fully-integrated, single application system.

Shell for 4th Dimension to create custom menus environments. Built-in support for 4D Write and 4D Draw.

European portal for all 4th Dimension software and books.

The homepage of QPix, QMedia, QuickList, BLOB Manager, and QFree