What is the latest version of iText? And what is the maven dependency for that?
You need to pay attention to the license for the Java version of iText:
2.1.7: the latest official release by iText Group NV, under the
4.2.1: the latest unofficial release by ymasory/InProTopia, under the
5.0.0and higher: released by iText Group NV, under the
com.itextpdfgroupId. One monolithic jar.
7.0.0and higher: released by iText Group NV, under the
com.itextpdfgroupId. Several modular jars.
Here you can find 2.1.7 and 4.2.x versions on Maven Repository:
Find before 5.x versions: http://search.maven.org/#search|gav|1|g%3A%22com.lowagie%22%20AND%20a%3A%22itext%22
You may want to stick with the MPL & GPL versions, unless you are available to follow the AGPL license specification...
EDIT: You should pay attention on which version you are choosing;
According to Bruno Lowagie comment, versions 2.1.x are deprecated and should not be used due to technical and legal reasons.