Origami vs Supernova: What are the differences?
Origami: A free design prototyping toolkit for Quartz Composer. Origami is a free toolkit for Quartz Composer—created by the Facebook Design team—that makes interactive design prototyping easy and doesn’t require programming; Supernova: Turn Sketch designs into native mobile apps in minutes. Supernova converts any mobile design to full-fledged native applications, giving the developers extra time to do actual coding. No need to export resources, write navigation, connect it to components created by hand, read styles, apply styles, copy-paste information..
Origami and Supernova belong to "Mobile Prototyping & Interaction Design Tools" category of the tech stack.
"Free" is the primary reason why developers consider Origami over the competitors, whereas "Super easy to use design to code conversion tool" was stated as the key factor in picking Supernova.
Origami is an open source tool with 3.35K GitHub stars and 467 GitHub forks. Here's a link to Origami's open source repository on GitHub.