Freelancer Stack - Curated directory of tools used by 10,000+ freelancers
Mobile First Index Checker - mobile first indexing, mfi, seo, mobile, google
Hourly - Find out how much you should charge per hour
Curatedseotools.com - Curated directory of the best SEO tools.
The Standard Freelance Contract - The first common standard service agreement
ContentKing - The world's only Real-time SEO Auditing and Content Change Tracking suite.