Really Good Emails - A large collection of good product email design.
Promyze - Define and share best coding practices to increase code quality and improve developers' skills.
Good Email Copy - Email copy from great companies.
Gamify Your Life - A Notion template pack to make work fun and get stuff done.
Good Sales Emails - Best sales emails from great companies
GetBadges - GetBadges is a gamification platform which allows developers to play and compete while using software development tools.