Galen Gidman has made a set of 30 CSS3 Progress Bars – each it’s own color. He is offering them as a 100% free download. Those progress bars were using no images what-so-ever… just CSS3. You can use them wherever you like, even in commercial projects.
Requirements: CSS3 Supported Browsers Demo: http://lab.galengidman.com/progress-bars/
License: License Free