The CheckStyle distribution contains several example XSL files for formatting reports. With CheckStyle 5.0, they are:
checkstyle-author.xsl checkstyle-csv.xsl checkstyle-frames-errors.xsl checkstyle-frames.xsl checkstyle-noframes-sorted.xsl checkstyle-noframes.xsl checkstyle-simple.xsl checkstyle-text.xsl
Some of the names are more obvious than others. I'm trying to figure out the exact features in each so that I can pick one for an automated build.