Two small plugins, both public, both released rather than sitting in a folder.
Custom Favicon adds a settings page under Settings with a media-library picker or a URL field. Policy Checkboxes adds a required privacy-policy tick to the WooCommerce checkout, with an optional second one for refunds and returns, both configurable from a WooCommerce settings tab rather than by editing a template.
They are here because released beats clever. The interesting thing about a plugin someone else installs is that you no longer control the environment it runs in, and everything it assumes has to be defended.