A keyword research application, KWFinder helps you find the keywords your competition hasn’t discovered yet. Reviewers love it! There’s even a free subscription offering 5 lookups and 100 backlinks per 24 hours and 50 keyword suggestions per search. This keyword tool comes up with niche-related longtail keywords and gives them an SEO difficulty score; the lower the score, the higher the rank. For more options, go for a paid subscription.