@z3dev Thanks for the comments.
I do think a catalogue in the website would definitely increase popularity of JSCAD.
This will attract people who never got interested in JSCAD --- those who don't know how to code and can't use any CAD software.
Sadly, most of them might be only end users and cannot directly help the development of the JSCAD project.
As far as I know, the people in this community are all fully capable of both programming and 3D modelling.
Maybe there can be a mechanism which can discover what those "end users" need most, and help the develop team to build accurate designs for those users.