American Association of Fund Raising Counsel (AAFRC) http://www.aafrc.org/

American Council on Gift Annuities http://www.acga-web.org/welcome.html

Association of Fundraising Professionals (International) http://www.afpnet.org/

Association of Fundraising Professionals (Central PA Chapter) http://www.afpcentralpa.com/

Chronicle of Philanthropy http://www.philanthropy.com/

Compass Point http://www.compasspoint.org/

Council for the Advancement and Support of Education: http://www.case.org/

Council on Foundations http://www.cof.org/

The Foundation Center http://www.fdncenter.org/

Forum for Fundraising http://www.forumforfundraising.com/

Guidestar - Form 990s & information about nonprofits http://www.guidestar.org/

Harvard Family Research Project http://www.gse.harvard.edu/hfrp/index.html

Internal Revenue Service:  Basics for 501(c)(3) Organizations http://www.stayexempt.org/

Internal Revenue Service:  Nonprofit Resources http://www.irs.gov/charities/index.html

Internal Revenue Service:  Official Charitable Organization Listing http://apps.irs.gov/app/pub78

Idealist.org http://www.idealist.org/

The Independent Sector http://www.independentsector.org/

Interactive Institute for Social Change http://www.interactioninstitute.org/

Lancaster City http://www.cityoflancasterpa.com/

Lancaster County http://www.co.lancaster.pa.us/

National Committee on Planned Giving http://www.ncpg.org/

Nonprofit and Voluntary Sector Quarterly via Sage Publication online http://nvs.sagepub.com/

Nonprofit Issues http://www.nonprofitissues.com/

Nonprofit Resource Network (at Millersville Univ.) http://www.nonprofitresourcenetwork.org/

Nonprofit Sector Research Fund http://www.nonprofitresearch.org/

Nonprofit Times http://www.nptimes.com/

Pennsylvania Association of Nonprofit Organizations http://www.pano.org/

Pennsylvania Bureau of Charitable Organizations http://www.dos.state.pa.us/char/site/default.asp

Pennsylvania Foundations Online http://pafoundations.net/

Planned Giving Design Center USA http://www.pgdc.net/

Planned Giving Resources, Inc. http://www.pgresources.com/

Planned Giving Today http://www.pgtoday.com/

Susquehanna Valley Planned Giving Council http://www.svpgc.org/

TechSoup http://www.techsoup.org/

The Urban Institute http://www.urban.org/

Young Nonprofit Professional Network http://www.ynpn.org/