Eduflow - Digital learning that actually teaches students something
Freeplane - Freeplane is a powerful and free software for building mind maps.
Backchannel Chat - Backchannel Chat is best in class discussion tool that is intended for teachers to streamline their class activities.
Linked Ideas - A macOS/iOS apps to treat ideas as links of concepts.
Flowlingo - Get fluent in a language through content immersion
OmniOutliner - OmniOutliner is a writing app for collecting information, outlining ideas, adding structure to any sort of writing.