If I'm looking for a tool or set of tools (software, mostly) to do something that I'm clearly not knowledgeable enough to create on my own, how can I get that without asking an off-topic shopping question on SE?

In other words, if I were to create my own tools, I could ask about all the details in multiple questions, and all of them would be perfectly legitimate. But what if I want to just use a tool that someone else probably made already? How do I find that?

I'm sure there are lots of people on the SE network that would know. The only problem is that it's not allowed to ask here as far as I can tell.