Looking for keywords that will make you money? Don't want to pay?
 

Keyword suggestion tool ? Google suggest scraper ? Übersuggest

Keyword Tool: FREE Alternative to Google Keyword Planner

If you really want to go SUPER NINJA on lucrative low competition keywords, check out backlinko.com and look up Brian's tips on how to use REDDIT and WIKIPEDIA for keyword research?

The first one didn't tell you the traffic for each link, so how could you know the value if you wanted to target them or not? Isn't it worth it to spend some money and target important things than to go for free and target things that may be completely irrelevant traffic wise?

I use semrush.com