These databases focus on computer science and related disciplines:

ACM Digital Library
Association for Computing Machinery

Citations, abstracts, and full-text articles from ACM periodicals and proceedings.

Computing Reviews

Provides critical reviews by computing experts of books and papers in the computing field.

INSPEC
(via Engineering Village)

Abstracts from sources covering physics, computer science, information technology, etc.

Library, Information Science & Technology Abstracts
(via EBSCOhost)

Abstracts to articles on bibliometrics, online information retrieval, information management and more.

MathSciNet

Mathematical Reviews online; citations and abstracts to mathematical literature.

These two databases provide access to pre-print and online articles:

CiteSeer

Pre-print and online papers with an emphasis on computer science topics.

E-print Network

Pre-print articles in physics, materials, chemistry, mathematics, computer science, biology, environmental sciences and other areas, from a variety of pre-print servers.

These general databases cover all subjects, including computer science:

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 have full text newspaper articles:

LexisNexis Academic

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

ProQuest Newspapers

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