If you want Caecilia you can buy it from Linotype. It costs $26.00 "per weight" or $195 for the whole family.
http://www.linotype.com/1313/pmncaecilia-family.html
Part of the reason Charis is so popular is that, in addition to being a nice reading font, it is free and has a very liberal license (free to redistribute too).
eP