FontFamily is a great, free source for your font referencing needs!
Just browse through the library and you will see numerous fonts with their respective font names in order to reference within your apps or designs.
I came across this idea while I myself was working on a few applications and saw the need for a Font library for reference.
You can even write a few lines of text to see how it will look in different fonts immediately.
Since all of the free versions I saw contained adds, I decided to make one completely free with no strings attached.
For any questions or feature requests, please contact me in my support page.