http://www.duedil.com/
Free access to companies house data with a social overlay. Potentially includes data that Companies House charge for.
http://www.crowdcube.com/
Crowdfunding business in the UK. Similar to KickStarter, but focused on actually buying equity rather than a finished product. Seems a lot less polished and much smaller scale that kickstarter.
http://www.formationsdirect.com/
Company formation in the UK for £34 (online paperwork) or £59 (printed paperwork) or free (cashback) if you open a business bank account with HSBC or Barclays.