Just got back from accident I blogged on my other personal finance blogsite. Anyway I was browsing through my emails, someone shared me a link to this site which offers a tool for quoting how much you should charge your clients.
It allows you to properly quote efficiently your rate when working on projects for clients. Fill out the form with details about your rent, hardware maintenance, utilties, software and upgrades etc.. With all these factors you can come up with a good figure on how much you should charge your clients.
Download it over at FEAT(Freelance Estimation Assistance Tool).
The application was built on Adobe Flex and runs on Adobe Air.
So you need to have Adobe Air installed on your system which is free. Then install the FEAT application.