Google Accounts (Web Interface) - Create a free e-mail account, access to cloud storage, produce various types of documents (Office tools), Google+ profile, YouTube profile etc.
LibreOffice (Windows/ Mac/Linux) - Office tools to write documents, create spreadsheets and presentations.
Lingofy (Web Interface) - free cloud service for students. For checks for spelling, style, word usage and proper names in languages bokmål, nynorsk and English. Registration for students. Note! Free access for students.
Open Office (Windows/Mac) - Office tools to write documents, create spreadsheets and presentations.