Microsoft Business Solutions Great Plains, former Great Plains Software Dynamics and eEnterprise are Dexterity-written applications. Also small business line: Microsoft Small Business Manager or Small Business Financials is written in Dexterity and uses same code base as Great Plains.
The history of Dexterity. Great Plains Dexterity - is proprietary programming language and technology, designed back to earlier 1990th with goal to build platform independent graphical accounting package - Great Plains Dynamics. Dexterity itself is written in C (following popular those days hope - that C will provide platform independence). You can install Dexterity from Great Plains 7.5 CD #2. Obviously it requires a lot of learning / training, but it allows your custom piece be seamlessly integrated with Great Plains interface.
•Native Dexterity Cursors. Dexterity was designed as platform independent programming language and so if you want your code to be operable on all currently supported databases - you use Dexterity ranges and loops to manipulate records •Great Plains Dexterity with SQL Stored Procs Nowadays, most of Great Plains installations are moved to SQL Server - so you can use Dexterity for custom forms drawing only and make buttons run SQL stored procedures. •COM Objects calls. Beginning with version 7.0 Dexterity supports COM objects - you register them as libraries in Dexterity. Refer manual. This technique allows you to call such nice things as web services across internet.