The Google Cemetery - A list of dead Google products and why they died
Failory - Failory is a community visited by startup founders every day to read articles about entrepreneurship, interviews with failed and successful founders, insightful postmortems and our monthly reports.
YC Rejects - A community of rejected YC companies
Dead Startup Toys - Toy versions of iconic failed startups.
Startup 101 - TL/DR: Curated startup lessons for entrepreneurs who are looking to start a company as well as those in the process of building one.
Startup Stash - A curated directory of 400 resources & tools for startups