(a big thank you for your presentation )
Ideas:
Liberapay: https://www.peppercarrot.com/en/viewer/misc__2017-07-13_liberapay-lantern_by-David-Revoy.html
Framasoft/Mobilizon/Peertube:
https://www.peppercarrot.com/en/files/framasoft.html
Spritely/Wikipedia/Mascots:
https://www.peppercarrot.com/en/files/comissions.html
...and more in misc:
https://www.peppercarrot.com/en/artworks/misc.html
Good luck!