GitHub: https://yal-tools.github.io/ergo-keyboards/

It is not as big as some existing collections, however:

• I have filled out a bunch of metadata for the keyboards, such as switch profile and spacing, number/types of encoders, and information about the common and less-common input devices
• By limiting this to column-staggered and ortholinear keyboards only, it is possible to do a few more useful things, such as filtering based on column/row count (as if key count means much on smaller keyboards), key clusters, pinky stagger, or splay.
• Apart of filtering, you can sort the keyboards, toggle visibility of columns (to only see what you care about), and generally sift through keyboards pretty quickly.

A few more pictures:

Finding yourself some little keyboards with Choc/GLP switches

Taking a peek at the rarer 7+ column keyboards

Submitting a new keyboard

All in all, I hope that this will make it easier to answer “is there a keyboard that does X” type of questions