DoubelJ

With this plugin you can add a Training and associated Courses to your WordPress site. 
With a widget you can get a sorted list by date of the Training.
In newer versions there is an agenda with the training and an opportunity to add subscription forms at the training and an e-learning module.

JaJaDi Training

With this plugin you can add training and courses to your WordPress site.

Anders Hjort Straarup

This plugin enables <a href="https://yogobooking.com" rel="nofollow ugc">YOGO</a> integration on your WordPress website.
<a href="https://docs.yogo.dk/da/articles/6620472-integration-med-wordpress" rel="nofollow ugc">Official documentation</a>

YOGO Booking

The easiest way to embed YOGO Booking on your Wordpress website.

JaJaDi Training vs YOGO Booking