Dictionary and Translation:
Real Academia Española - The official Spanish dictionary in Spanish
Word Reference - Helpful translations, expressions, discussions, etc.
Grammar Help:
Conjuguemos - Extra practice worksheets on multiple concepts
Spaleon - Practice conjugating in Spanish in any form and any tense
Study Spanish - Multitude of explanations and practice
News:
ABC Español - International news in Spanish
CNN Español - International news in Spanish
El País - Spanish News Channel (American version in Spanish)
El Mundo - News from Spain
Google Noticias (Mexico) - News on Google from Mexico in Spanish
Google Noticias (USA) - News on Google from USA in Spanish
Yahoo Español - News, sports and entertainment in Spanish