The Google Cemetery - A list of dead Google products and why they died
Really Good Emails - A large collection of good product email design.
Startup Graveyard - History shouldn't have to repeat itself
Good Sales Emails - Best sales emails from great companies
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.
Great Email Copy - A dose of emails from around the web.