I was thinking of creating B4XPages project templates. For example, one might have only an animated splash screen; another, in addition to the splash, also a login "form"; etc.
This got me thinking that there is the "Additional libraries, classes and official updates" forum.
Now, since B4XPages are classes, you could just post some B4XPages there, such as one for animated splash screen, one for login, etc.
Although I already know the answer ("use a prefix in the title" ? ) having a forum dedicated to individual B4XPages would be nice.