1. SEMrush: This is a powerful SEO tool that includes keyword research, competitor analysis, and Google Ad campaign optimization. It’s a great tool for affiliate marketers to optimize their SEO strategies.

  2. Ahrefs: It is another SEO tool which provides an extensive keyword database and backlink analysis features which can help generate content ideas and monitor competition.

  3. Google Analytics: It is a must-have tool that provides insight into where your traffic is coming from. This way you can optimize your content and marketing efforts based on the data.

  4. Moz: Moz offers a suite of SEO tools that can help with site audits, rank tracking, backlink analysis, and keyword research. It also provides a significant amount of resources and learning materials on SEO.

  5. Canva: With Canva, you can create eye-catching designs for your promotional materials. It’s easy to use and comes with many templates.

  6. ConvertKit: This is an email marketing tool that allows you to create and segment your mailing lists, automate email sequences, and analyze campaign performance.

  7. MailChimp: Another popular email marketing tool which helps to manage subscribers, send emails, and track results.

  8. Grammarly: Grammarly is a writing tool that helps to ensure your content is free of grammatical and spelling errors.

  9. Buzzsumo: Buzzsumo helps in content research and social media analysis. It can help you discover trending topics in your niche.

  10. ClickBank: As one of the most popular affiliate marketplaces, ClickBank is great to find products to promote.

  11. CJ Affiliate: Another top marketplace for affiliate marketers. It has a wide variety of companies listed that you can work with.

  12. Pretty Links: This WordPress plugin allows you to manage, track, and shorten your URLs which is especially useful in affiliate marketing.

  13. URL shortener and click reporting tool.

  14. ThirstyAffiliates: A WordPress plugin that helps you manage and cloak your affiliate links.

  15. Voluum: It helps affiliate marketers to track, manage, and optimize all their advertising campaigns in one place.

Remember, the right tool depends on your specific needs and budget so choose wisely.