Fonts vs. Typefaces
A typeface means a style of lettering that can be used in many different typesetting systems. A font (today) means a digital implementation of a typeface.
SIL Open Font License and Open Font Library share the same acronym, OFL.
To avoid confusion, please refer to Open Font License as "OFL" and Open Font Library as "OFLB"
Open Font Movement
"Open Font Movement" is a clearer term related to Open Font Library and usage by a wide community of users of Open Font License. "Free fonts" are very often associated with distribute-but-don't-modify freeware fonts and don't reflect what this community is about.