Based on our record, Product School should be more popular than Polymail. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Polymail - This one is a lot like Twobird but with a lot more features. It's a different type of email client. It's really cool, but the Windows version is just a web app. It's available on iOS as well. Source: over 2 years ago
With that being said, there are also great platforms, blogs, people and sources to learn about PM online. I’d also recommend Mind The Product (https://www.mindtheproduct.com) and Product School (https://productschool.com). Source: about 1 year ago
Also, the product school does them https://productschool.com/. Source: about 1 year ago
Airmail - Airmail is a lightweight and lightning fast mail client for Mac.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Spark Mail - Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues
The Product Management guide - A book on how to create and ship products that people love
Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
The Product Manifesto - Product Managers face the biggest challenges of our day, which is why our community needs a common set of product principles.