Openutils-elfunctions is a set of EL functions that can be used in jsp pages, mainly related to string manipulation.
The tld uri you have to declare in your jsps is "http://openutils.sf.net/openutils-stringutils".
Look at the taglibdoc documentation for details on the available functions.
Check it at http://www.mvnrepository.com/artifact/net.sourceforge.openutils/openutils-elfunctions