Tutorials & Courses
A Brief Grammar of Euskara - A detailed Basque grammar.
Basque Lessons - In English and French.
Concise Course of Basque - A short course in Basque.
Curso Deusto de Euskera - Offers three levels of Basque lessons. In Spanish.
Interesting Reading Practice
Basque Bible - The entire Bible available in Basque.
Berria - Online news.
Gara - Online news.
The Little Prince - Available in Basque.
Wikipedia - Wikipedia in Basque. If online news isn't interesting enough for you, you can search for whatever you like on Wikipedia.
Things To Listen To
Euskadi Irratia - Online Basque radio.
Other Basque Resources
Digital Dialects - This website offers basic vocabulary and games to help you practice.