Richard W.M. Jones writes: "Red Hat (disclaimer: I work for them) has announced a set of metrically equivalent fonts to the popular, but proprietary Microsoft core fonts, released with source under the GPL. There are three faces, Liberation Mono (a substitute for Courier New), Sans (for Arial) and Serif (for Times New Roman). Sadly there is no news on a substitute for Comic Sans. RPMs are available from here and Ubuntu are working to include them too."