What are some alternatives?
When comparing Indie Channels and Productivity.so, you can also consider the following products
Crowdstack - Curated directory of crowdfunding resources
Content Marketing Stack - A curated directory of content marketing resources
Marketing Resources List - The biggest collection of free marketing resources
OutboundIQ - Free exportable list of the best sales saas companies.
Creojam - DIY marketplace, connecting makers and businesses
ProductivityMentor - 500 skills from the best books to boost your productivity