NicheGenerator.nyz - A funny solution to start with people, not ideas or products.
OutreachMantra - OutreachMantra is the leading Premium Buy & Sell Guest Post marketplace.
Idea Crunch - Successful business ideas not yet launched in your country
Collaborator.pro - Turn Content into Revenue.
The Idea Generator - A tool to help structure your business idea brainstorming
TheSeoLabs - Find news guest post opportunities with more than 15 000 Blogs that accept guest post, with contact information and SEO metrics.