One of the most intriguing keyword research tools around, Ubersuggest, now has a significantly expanded database, which makes it well worth a look. I find that even for relatively technical product types, it comes up with a lot of decent ideas. Obviously with low numbers, the data might not be that accurate, but I’ve never found that to be so important when searching for new keywords. If you’re in the market, you know what’s important once you see it.
The additional suggestions can be found under a new ‘Related’ tab. There’s also the excellent ‘keyword overview’ screen, which shows you the top 100 Google results and some link-related data from each website. Have a play.