AdvanZ Design
Applications and databases, modules, installation, administration, and design.
Copernicus Business Systems
Modules and OpenXB - a MySQL Solution for Merchant
Crosstown Traffic.Net
Offers OUI module development and custom scripts.
JMH Web Services - Module Directory
A searchable directory of modules listed by developer and function.
modStop, Inc
Offering modules, development and other services. Includes tips and free modules.
MvCool Module Superstore
A collection of modules from various developers for sale.
NetBlazon
Provides retail modules and other applications, along with custom design and programming.
Viking Coders
Offer a range of modules, support services, upgrades and custom development.