https://www.naturalreaders.com/online/ (my favorite)
https://speechify.com/text-to-speech-online/ (my second favorite)
https://freetools.textmagic.com/text-to-speech (my third favorite)
https://extract.pics/ (image extractor)
https://www.sakailms.org/ (similar to Moodle: needs a host)
https://extract.pics/ (extract images from websites)
https://www.naturalreaders.com/online/ Text to Speech
https://ttsreader.com/ Text to Speech
Czech Corpus: https://www.korpus.cz/slovo-v-kostce/
Russian Corpus Analyzer:
https://www.jove.com/ (Educational videos)
https://www.thebalancemoney.com/how-to-end-a-letter-2062308 (How to end a letter)
https://www.wirewax.com/studio/ (interactive videos)
https://ant.umn.edu/ants (anotation of videos)
https://go.playposit.com/ (interactive videos)
https://d21hwc2yj2s6ok.cloudfront.net/assets/uploads/341158/asset/Google_tools.pdf?1675957991 (Google Tools for Special Needs)
https://gitmind.com/ (best for mind maps, in my experience)
https://miro.com/ (nice post it notes in mind maps)
https://www.whiteboard.chat/
http://spaceteamesl.ca/ (cell phone game)
https://twinery.org/ (story making; an example here: https://youtu.be/qGtP4YTTK_U )
https://www.inklestudios.com/inklewriter/ (story making; quite complicated, just like Twinery)
https://storymap.knightlab.com/ (story making; all of these websites are overcomplicated)
https://www.blendspace.com/ (LMS: Learning Management System)
https://www.vocabkitchen.com/home (analyzes text to determine CEFR level of each lexical item)
https://klaxoon.com/ Visual tools for Teamwork
https://hinative.com/ (ask a native speaker your doubst, apparently for free)
https://www.storyblocks.com/pricing (image and video stock; it's not free unfortunately)
https://www.calculator.net/time-zone-calculator.html (Time Zone Calculator)
https://www.getepic.com/app/search (books reading)