Really Good Emails - A large collection of good product email design.
Motion Firefox - All-in-one time management tool in Firefox
Good Sales Emails - Best sales emails from great companies
Task Muncher - Task Muncher is a cross-platform and web-based application that is designed to organize and keep the track of everything and focus on munching the weekly tasks.
Great Email Copy - A dose of emails from around the web.
Taskable - Using multiple work apps leads to tons of context switching, breaking flow and killing productivity.