I think i have seen someone posting a link which had a collection / summery for javascript plugins which are working without dependencies (no jquery) and bring alternatives to galleries, sliders, modals etc.pp.
however i didn’t bookmark the link and i can’t seem to find the thread with it. as well as google doesn’t seem to like me today.
If anyone knows that site, or something similar, i am happy to hear from you 
I know of two sites:
There was also vanillalist.com, but it appears offline.
The magic keyword is ‘vanilla javascript’, so you know what to search for .
Edit:
Also, there’s Awesome Javascript : https://github.com/sorrycc/awesome-javascript , but there’s some jQuery as well…
the first link was, what was posted.
the second link i found myself, and yes i have also searched for vanilla javascript. i came across a couple of other articles which lists some nice things as well.