EXtremecomponents is a project mainly written in JAVA and JAVASCRIPT, it's free.
eXtremecomponents taglib extension
famous table taglib components (from http://sourceforge.net/projects/extremecomp/) it's not updated so far.
I did something based on original project. 1.It supports multi column headers now 2.Remove something not usefull callback. 3.Add totalRows attribute to TableTag
please check out code,see demo.