National Philanthropic Trust

Helps people create donor-advised funds to support charities, while maximizing tax deductions and eliminating paperwork. Features mission statement, guides, and philanthropic resources.
http://www.nptrust.org/

The Jewish Communal Fund

Provides donors the opportunity to simplify their charitable giving and maximize tax savings through the use of donor-advised funds.
http://www.jewishcommunalfund.org/

National Center for Family Philanthropy

Encourages families and individuals to create and sustain philanthropic family foundations. Offers programs, publications, articles, resource links, a newsletter, calendar of events, and a FAQ.
http://www.ncfp.org/

National Charitable Gift Fund

A tax-exempt publicly supported community trust.
http://www.managed-giving.org/

International Society for Third-Sector Research (ISTR)

Promotes research and education in the philanthropy, civil society and nonprofit sectors. Includes membership information, affinity groups, conferences, and publications.
http://www.istr.org/

National Committee for Responsive Philanthropy

Committed to making organized philanthropy more responsive to socially, economically and politically disenfranchised people. Features publications, current projects, and membership information.
http://www.ncrp.org/

More Than Money

An organization that helps wealthy people learn to use their resources to create a better world. Features a quarterly journal, membership information, events, discussions, coaching groups, and an online store.
http://www.morethanmoney.org/

JustGive.org

Connects people with charities and causes. Provides a searchable nonprofit database, ways to give, donor info, inspiring stories and quotes, newsletter, and nonprofit resources.
http://www.justgive.org/

Institute for Philanthropy

Aims to promote philanthropy via research, debate, publications and by encouraging the philanthropic sector in Britain. Includes research and study opportunities, areas of activity, newsletter, and contact information.
http://www.instituteforphilanthropy.org.uk/

Philanthropy Roundtable

Association of nonprofit professionals and private donors. Features organization profile, history, email newsletter, the magazine "Philanthropy", online store, and meetings information.
http://www.philanthropyroundtable.org/