I want to see it firsthand....
- American Heritage Dictionary of Idioms - Cite This Source
Without charge, gratis, as in You can't expect the doctor to treat you for free. [Colloquial; c. 1900]
- Free On-line Dictionary of Computing - Cite This Source
Said of a capability of a programming language or hardware equipment that is available by its design without needing cleverness to implement: "In APL, we get the matrix operations for free." "And owing to the way revisions are stored in this system, you get revision trees for free." The term usually refers to a serendipitous feature of doing things a certain way (compare big win), but it may refer to an intentional but secondary feature.