Download and Have Fun — Free Jomla Templates
iboldesign is a jomla based sites that host tens of free jomla templates. Man behind this site is Andi Meizopan, which is my friend. Meizopan has been running this free jomla templates website quite long and his free template has been downloaded by thousands jomla users eversince.
You will find various jomla theme there, all with nice colors and good css (tested valid cross browser).