None of my plugins sets cookies. Except of link-log none of my plugins collects or stores any data. None of my plugins sends any data to external servers.
The link-log plugin stores IP-addresses of visitors in your database to identify multiple clicks from the same IP-address and exclude them from counting. As of version 3 the link-log plugin encrypts the visitors IP-address before storing it into the database. The encrypted IP-addresses can not be decrypted. The plugin also forces you to encrypt the already existing data. This enables you to use this plugin according to the GDPR without the need to inform your users.