Apache Commons Lang · Apache Commons Lang, a package of Java utility classes for the classes that are in java.lang's hierarchy, or are considered to be so standard as to justify existence in java.lang.
Apache Commons IO · The Apache Commons IO library contains utility classes, stream implementations, file filters, file comparators, endian transformation classes, and much more.
Apache Commons Text · Apache Commons Text is a library focused on algorithms working on strings.
Apache Commons FileUpload · The Apache Commons FileUpload component provides a simple yet flexible means of adding support for multipart file upload functionality to servlets and web applications.
Apache Commons Collections · The Apache Commons Collections package contains types that extend and augment the Java Collections Framework.
