Validated ideas - List of 5,000 poorly executed but popular apps
Startup Stash - A curated directory of 400 resources & tools for startups
Burner Page - Validate ideas with burner pages in < 60 seconds
The Influencer Marketing Stack - Free resources to launch a killer campaign
Talk to Customer - Validate your idea with potential customers in 3 steps
Makerbook - A directory of the best free resources for creatives