Thanks to Nadav Kavalerchik for sharing this link to a collection of LTI services you might be able to try from your Moodle site using the External Tool resource. Nearly 80 different tools are shown (including the ones already collected in our own LTI library). A great resource if you’re looking for more great ways to extend your Moodle’s capabilities.
LTI of Magic: https://lti-examples.heroku.com/index.html
If you’re interested in sharing additional tools feel free to post them here: https://www.moodlenews.com/2013/lti-store-share-your-demo-connections/