I understand how this works in terms of mockups and how useful it can be - where it gets confusing is in tools like Origami which uses Facebook frameworks:<p>&gt;Origami can now export code for the parts of your prototypes you used to have to tediously spec to engineers. Now with the click of a button, you can deliver your animation specs as code to your engineers that they can <i>copy-and-paste into the project.</i><p>&gt; This uses our _free, open source_ animation frameworks to deliver the exact same feel across all platforms. Take a look at some sample code this can generate and learn more about it.<p>Which runs in direct contrast with the above License:<p>&gt; The Facebook Design Resources <i>may not be embedded in any software programs</i> or other products without express written permission.<p>Unless Origami isn&#x27;t considered a &quot;Facebook Design Resource&quot; (and is a different type of resource, correct me if I&#x27;m wrong here), this seems like lawsuit bait.