These general databases cover all topics and are the best place to begin searching for journal articles:

ProQuest

Full-text articles, citations and abstracts covering all subjects.

Wilson OmniFile Fulltext

Full-text articles, citations and abstracts covering all subjects.

These two databases are good for overviews of current issues:

Opposing Viewpoints Resource Center
(via GaleNet)

Full-text "pro" and "con" essays and articles on controversial social issues.

CQ Researcher

Use CQ Researcher provides overviews and analyses of current issues.

These two databases index scholarly articles:

Project Muse

Over 100 full-text electronic journals in the humanities and social sciences, including several philosophy journals.

Philosopher's Index
via Cambridge Scientific Abstracts

Contains citations and abstracts to books and journal articles in the field of philosophy, 1940-present.

These three databases have full-text newspaper articles:

LexisNexis Academic

Hundreds of regional, national, and international newspapers; business publications, and much more.

New York Times
(1851-2001)

Full page and article images of the historical New York Times.

ProQuest Newspapers

Nine national newspapers including the Los Angeles Times and Wall Street Journal.