Based on our record, esp32 should be more popular than Moodle. It has been mentiond 3 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.
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 2 years ago
Esp32.net has a bunch of additional references, projects, and places to gather information. Source: almost 4 years ago
Closest thing is the ESP32 from Espressif Systems See ESP32 link for details. Since you specifically asked for open source, so some tinkering and compile is required. Source: about 4 years ago
There's also many more dev boards, chips and modules listed here, though they may not necessarily have platformio IDs. Source: about 4 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.
Intel NUC boards - Four-by-four inch Intel NUC boards come with a soldered-on processor.
LMS Collaborator - LMS Collaborator is a state-of-the-art learning management system designed to meet the need for corporate training, upskilling, and evaluation with flexible integration abilities.
Intel NUC - Intel NUCs are available as Kits(Barebones), Boards(Mainbaord only) and as perconfigured Mini-PCs.
Talent LMS - A super-easy, cloud LMS to train your employees, partners, customers or students.
SanCloud BeagleBone Enhanced WiFi 1G - One amongst SanCloud's range of BeagleBone Enhanced SBCs - each are enhancements of the BeagleBone Black (BBB).