The Gallup Organization.
Provides a keyword search option for an archive of full-text opinion polls on various topics.

Harris Poll Library.
Articles from 1998 to the current. Includes a variety of subjects including politics, the economy, health care, foreign affairs, science, sports, entertainment, and lifestyles. The weekly Harris Poll is usually based on a nationally representative telephone survey of 1,000 adults aged 18 or over.

HyperQuick Algorithm at Marvin - Computational Applications.
This page is dedicated to the analysis of the survey results by means of discrete hypergeometric distribution.

National Council on Public Polls.
An association of US polling organizations devoted to setting high professional standards for surveys.

Pew Research Center.
A nonpartisan organization which conducts public opinion polls on issues, attitudes and trends shaping America and the world.

PollingReport.Com.
Includes Gallup, Harris, Yankelovich, Princeton Survey Research Associates, network news polls, and more.

Pollster.com.
Political surveys and education polls, trends, charts, and analysis.

Public Agenda.
Public Agenda's research attempts to explain and clarify public attitudes about complex policy issues.

Public Opinion Poll Question Database.
From the University of North Carolina at Chapel Hill, Institute for Research in Social Science, an incredible search engine that allows you to search by keyword, anywhere within the survey, from poll source, and limited by date range.

USA Election Polls.
Tracks the public opinion polls related to elections in the USA.

Vizu.
Create your own online polls, post the results, and analyze the data. You can also share polls through email, IM, RSS, blogs, or Web sites.