(Shotcut)Forum user @jonray has made a collection of transitions: https://drive.google.com/drive/folders/ ... Cw5aCBZTxv
these are on google drive... there are a lot of geometric fades and "ink"...
these trasitions are on MP4 format .. and they need to be used as a mask.
this link is a public link and i taken it from official page of this videoeditor.

this is an example of one: http://www.wcn.it/mtsquares.mp4

a way to use these masks is the "shape alpha" effect.. just selecting the MASK as a VIDEO RESOURCE

Awesome! Thanks for sharing! And thanks to @jonray for creating and publishing the files!