Check out the GUI prototyping add-on Pencil Project for Firefox.
About Todd Harris
I'm a freelance consultant specializing in all things data (modeling, storage, management, analysis, visualization, cloud) for the biomedical, pharmaceutical, and financial sectors.
Do you have a data management, analysis, or visualization problem you need some help with? Do you need to connect with the best people to build out your team of data scientists, bioinformaticians, or curators? Drop me a line -- I'd be happy to chat with you about your project.