Association of Volunteer Managers
Has one or two articles about managing volunteers. There is also a link to a summary of the National Occupational Standards for Managing Voluntary Workers.
Baker-Tilly
This consultancy website had free access to their document Managing charity finances through uncertain times
Charity Days
This training company with give time free-free to registered.charities, but will charge for expenses.
Cranfield Trust
This is a charity wahich provides free management consultancy for other charities. It has a newsletter for non-profit organisations, whom it realises can often not alaways afford to employ an HR person. You will need to register to be able to access the newsletter.
Roots
This company is a not-for-profit human resources services provider.