Stuff that I find very useful

Websites about English language

Common errors in English http://www.wsu.edu:8000/~brians/errors/errors.html#errors

Collocation http://www.collins.co.uk/corpus/corpussearch.aspx

Mirriam Webster dictionary http://mirriamwebster.com/

Intelligent debates

Science and environment http://news.bbc.co.uk/1/hi/sci/tech/6288941.stm 
Alternative voices http://www.altvoices.org/

Free programs

Picasa – photos editting, management, and sharing http://picasa.google.com/