Although not affiliated with Walmart.org, the following organizations may provide additional guidance or support to your organization.
Internal Revenue Code (IRS): The IRS provides useful resources for charities and other non-profits. A full list of tax status definitions can be found here.
BoardSource: BoardSource offers nonprofits resources supporting board leadership and development.
The Foundation Center: The Foundation Center provides information on philanthropy, fundraising and grant programs.
GuideStar: GuideStar provides an online database of nonprofit organizations including missions, programs, leaders, goals, accomplishments and needs.
United Way: United Way serves individuals and organizations through training, resources and technical assistance in your local community.