Validated ideas - List of 5,000 poorly executed but popular apps
FlowMapp - FlowMapp is a UX planning tool for creating visual sitemaps and user flow.
IdeasAI - OpenAI-powered startup idea generator
Octopus.do - Build your website structure in real-time and rapidly share it to collaborate with your team or clients. Start prototyping websites or apps instantly.
The 25 Days of Ideas - Free resources for coming up with startup ideas
DYNO Mapper - Create Sitemaps with the DYNO Mapper Visual Sitemap Generator.