Here are some free SEO Tools I have made in Google Sheets. Feel free to make copies and tweak them.
Quick Win Keyword Finder
Find keywords you can quickly improve with just a few tweaks. 👉 Quick Win Keyword Finder
Content Gap Finder
Find content gaps you can quickly fill in. 👉 Content Gap Finder
Keyword Cannibalisation Finder
Find keywords you are cannibalising super quick. 👉 Keyword Cannibalisation