Star Office in Google Pack

Google added Star Office, a suite of office applications similar to MS Office, to its Google Pack service.

The bundled service is free and includes Skype, Adobe Reader, Firefox, Google Earth, among others. I'm an active user to most of these applications except for RealPlayer and Picasa (offline version.) I still have issues uploading photos from Picasa to PicasaWeb.
Lowtech.

I recommend using these free applications.