Here below some SEO Tools that I usually use, just share them to you.
- Google Keywords Planner
- SE ranking
- SEMRush
- LongTail Pro
- Open Site Explorer
- seositecheck.com
- woorank.com
- Ahrefs
- Alexa
- Google PageSpeed Insights
- Google Analytics
- Google Webmaster Tools
- CopyScape
Hope this helps you to improve the SEO.