The original files annie-solo.png and annie-sticker.png, were re-encoded using the OxiPNG codec via https://squoosh.app, and are available under:

Copyright 2015 Andrea Ruygt.
Licensed under the Creative Commons Attribution-4.0 International
License, available at https://creativecommons.org/licenses/by/4.0/

The files solo.svg and sticker.svg are vectorized versions based on Annie's original raster (PNG) files. The log raft and clouds were traced automatically using Inkscape. The sky was made slightly darker and more blue to increase contrast with the "raft.github.io" text. The font used is v1.x of Comfortaa (note that the f and t in 'raft' look different in v2.x). solo.svg and sticker.svg are:

Copyright 2015 Andrea Ruygt.
Copyright 2015 Diego Ongaro.
Licensed under the Creative Commons Attribution-4.0 International
License, available at https://creativecommons.org/licenses/by/4.0/