Polymail might be a bit more popular than Moodle. We know about 1 link to it since March 2021 and only 1 link to Moodle. 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.
Moodle can handle this but it might be overkill for your requirements. Once you have it setup though the quiz feature is really great, and the analytics it provides are awesome. Source: about 1 year ago
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
Adobe Learning Manager - Adobe Learning Manager (formerly Adobe Captivate Prime LMS) is easy to setup and helps in delivering engaging learning experiences in a personalized manner across devices.
Airmail - Airmail is a lightweight and lightning fast mail client for Mac.
Collaborator - Система дистанційного навчання повного циклу із аналітикою в реальному часі та інструментами внутрішнього маркетингу.
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
Geocities Site Builder - Share your abomination with the world
Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!