Estonia's Digital Nomad Visa, the first of its kind in Europe, is a long-stay D-visa allowing remote workers to live in Estonia for up to 12 months while working for foreign employers, their own foreign company, or mostly-foreign freelance clients. You must show income of at least EUR 4,500 per month over the previous 6 months, and the state fee is EUR 120. The visa cannot be extended in-country and does not lead to residency, though you can apply again later.