Aside from my DateTime/TimeZone projects, I want to study what are the essential controls in everyday Line of Business (LOB) Applications. A LOB Applications are applications that forms the backbone of running a business/enterprise. E.g. accounting applications, supply chain management, resource planning, or any applications you use to in your work. These are applications typically developed by corporate developers.

What are some LOB Applications you use or make? What WinForms controls do you use regularly?