Finding modules in the market place is not very easy.
It would worth to have a real full text search engine with multi key words search, synonyms, etc...
One example, today i was looking for a module that can test the IP address of the client.
But i had no idea if it was existing or not.
“IP address” was my request, but it returned nothing and then assumed that such a module simply didn’t exist.
By hazard and luck, i discovered that the module “IP Range Validation” was doing exactly what i was looking for.
I do think that a real full text engine would have found it...