I have briefly tried out YouMagine as an alternative to Thingiverse, which has been in a state of increasing deterioration since 2017. Unfortunately this site also seems too stagnant for the effort I put into it, so I won't be adding new designs. I am moving my models to GitHub and will also publish new models there. Follow to the above link to www.dr-lex.be to get an overview of all the available models.