Google Grant programme for the UK

Google has launched a grants programme that provides free use of its Adsense
advertising tools. That's the way that the adverts appear alongside the
search results on the Google home page.
It means you can use it to generate extra viewers for your website and
therefore raise your profile and help raise funds. You'll need to know a bit
more about how it's advertising tools work but it's pretty simple there's
lots of help available.
More details at http://www.google.co.uk/grants/