Really Good Emails - A large collection of good product email design.
Survey Monkey - Create and publish online surveys in minutes, and view results graphically and in real time. SurveyMonkey provides free online questionnaire and survey software.
Good Sales Emails - Best sales emails from great companies
Self Test by Ahead App - Receive anonymous & honest feedback on your social skills
Great Email Copy - A dose of emails from around the web.
Matter - Create a feedback-focused culture in Slack with Matter!