Which is correct: "Grails" or "The Grails"?

Solution 1:

Usually, as other answers note, names of software products and other proper-noun names don't take the.

Yet some, especially plurals, do, like the Netherlands, the Internet, and the Web. (To be honest, I can't think of a software product whose name takes the. Nonetheless,) I think it simply depends on what the common use is for any given proper noun: try to find Grails and the Grails (and The Grails, I suppose) in use.

Solution 2:

"Grails has integration with jUnit"

"Grails" is a proper name. So the article is dropped.

Example:

"George has a lollipop."

NOT

"The George has a lollipop."

Solution 3:

We usually do not use the in front of software names. Nobody says the Windows, the Perl or the Python. However, in a sentence like

The Windows computer is still working,

the article really refers to the computer.