News archives:

• Google News (sadly a shadow of its former self since Google 'be'd evil' and wiped the archive)
• Google Newspapers - a poor replacement for the Google News archive
• British Newspaper Archive (subscription required - see WP:BNA)
• Trove - Australian newspaper archive
• HighBeam - mixed bag of archive news articles (subscription required - see WP:HIGHBEAM)
• Chronicling America - American newspaper 1836-1922
• Time Magazine archive
• Welsh Newspapers Online
• Guardian and Observer Digital Archive