So I suggest that there be a section listing modules that should exist, but do not yet.

What's with this "I suggest that there be a section for..." frenzy, as of lately? I'll tell you in advance that such requests tend not to meet popular approvation, and someone will certainly give you more detailed info on why it is so. Personally I'll only add that IMHO far more interesting proposals for new sections have been given - and they were rejected nevertheless: what you need is addressed perfectly fine by Meditations. OTOH this convinces me more and more that what we need is a tagging system.