GitHub holds a wealth of WordPress and WooCommerce plugins. Each of the can be downloaded and used like any other WordPress / WooCommerce plugin.
It requires one additional step of preparation though: When downloading a plugin from GitHub you need to rename the root folder of the plugin and then recompress the folder again without the “master” in the filename for upload.
Too small? View GIF in full size.
You can now upload the file manually. Here is an article on how to do so.