The ExDBGrid Component Suite is distributed as Freeware for non-commercial use.
If you use it commerically, you are required to register.

How do I register?

The cost of a licence is US$10. This license permits development and
distribution of the ExDBGrid Component Suite in compiled form, in any type of
application - be it commericial, shareware, or freeware.

The quickest and most convenient way to register the ExDBGrid Component Suite is
online via credit card.

Registration URL:
https://secure.element5.com/register.html?productid=133145&language=English

What do I get when I register?

You get all further ExDBGrid Component Suite versions free, including full
source code of course.