It's an open source library for generating convincing looking mock data for demos so you have a bunch of mixed, convincing names and not just John Doe1, Jane Doe2, test@example.com

It handles about 60 types of data.

It was previously a source of controversy in the open source funding debate when Marak posted a fuck you, pay me where he refused to make any more updates until some of the corporate users started sponsoring the project, which Godaddy eventually did.