idealist.org

About.com
A survey of US and Canadian salaries.

Bridgestar
"Bridgestar Compensation Study" (May 2004)
(requires free registration)

CareerBuilder Salary
A free salary calculator. Enter "non-profit" to find average nonprofit job salaries in your area.

Economist Intelligence Unit
Purchase or subscribe to EIU's Worldwide Cost of Living data.

Expatica
"Cost of Living Allowance basics"" (Jan 2005)

Guidestar
"Best Practices in Nonprofit Compensation" (2003)

Hauser Center for Nonprofit Organizations, Kennedy School of Government, Harvard University
"The Price of Doing Good: Executive Compensation in Nonprofit Organizations" (Oct 2001)
Format: PDF

"Introduction to Compensation: Dispelling the Myths about Nonprofit Compensation Plans"
Dianne Burt-Green, MBL Group, LLC
Format: Powerpoint. A presentation from Idealist's 2004 Putting People at the Center conference.

JobStar
A list of profession-specific salary surveys.

Mercer Human Resources Consulting
Worldwide Cost of Living Survey 2006 – city rankings

OnPhilanthropy
"Nonprofit Compensation: Does Organizational Type Matter?" (27 Dec 2002)

Report on Salary Surveys
This monthly report analyzes data from major salary surveys released during the year by the biggest compensation survey companies (WorldatWork, SHRM, state HR societies, etc.) to give readers an overview of those expensive, hard-to-manage services. (Online and in print)

Salary.com
A catalog of compensation assessment tools.

SalaryExpert.com
A catalog of compensation assessment tools.

SalaryMap.com
This interactive site collects and maps salary survey data.

The Chronicle of Philanthropy
"Executive Pay Rises Modestly" (30 Sep 2004)