Stickery is a GIMP plugin that puts a bordure arround the current layer to "stickerify" it by putter a bordure arround it.
It's meant for creating Telegram stickers (and also an excuse to try to write a plugin because fun.)
The plug is located in Filter > Artistic > Stickerify
And provide the following options:
For gimp 2.8, haven't tested on other versions but it should work too.
sudo apt install gimp-python git clone https://github.com/Psycojoker/sticker_bordure cd sticker_bordure # local install mkdir -p ~/.gimp-2.8/plug-ins/ ln -s $(pwd)/stickers_bordure.py ~/.gimp-2.8/plug-ins/ # global install sudo ln -s $(pwd)/stickers_bordure.py ~/usr/lib/gimp/2.8/plug-ins/