Estonia is the first country to offer e-Residency to people living and working around the world. E-residents are provided with a government-issued digital identity that that gives you easy online access to Estonian and European Union business environment from anywhere in the world. You can read more here.
Please be aware that e-Residency does not confer citizenship, tax residency, residence or right of entry to Estonia or to the European Union. It is not a visa or residence permit.