These are some useful organisations I have good links with. Click for their own websites.
Association of Charitable Foundations
My employer, 1990-2002, and a source of essential information for UK independent foundations
Philanthropy UK CAF research National Council for Voluntary Organisations
Information about charitable giving
Community Foundation Network Big Lottery Fund Charity Commission
Directory of Social Change Charities Evaluation Services
A key website for directories and training Material on evaluation, outcomes, etc
Jacqueline Rae & Rob Lilley's consultancy - IT support for grant-makers IT support for vol orgs
Foster Murphy’s Consultancy – strategic planning, mentoring and leadership development consultancy, with special expertise in social care, housing, older people, and volunteering
David Carrington Another grant-making expert, with whom I sometimes work jointly
Andrew de Mille Fundraising Consultants
A long established expert fundraising consultancy - specialising in capital campaigns, major gift strategies, and strategic advice in fundraising development
European Foundation Centre Worldwide Initiatives for Grantmaker Support (WINGS)