Creatabot is a project that connects, promotes and supports creativity. Based in Medway, UK. Additional projects include CreataboX and Urban Medway.
Without a shadow of a doubt the jobs section on the arts council website should be your first point of call when looking for jobs and artist commissions. http://www.artsjobs.org.uk/
Another place to look is on the Guardian website – http://jobs.guardian.co.uk/jobs/arts-and-heritage/
The Stage Newspaper and Online is not just for actors and actresses – http://www.thestage.co.uk/recruitment/
Creative Boom have a jobs section – http://www.creativeboom.co.uk/jobs/
A smaller site – http://www.periscopeuk.com/
For film and production – http://www.filmcrewpro.com/uk/jobs.php
This is an open article – please add where you also find is useful in the comments box below.