...Apart from the Maven distribution the CollLib binaries are also available in the "Files" section. When using the manual download from there, you also need to include the following jar files in your project:
juel-api-2.2.7.jar, juel-impl-2.2.7.jar, commons-beanutils-core-1.8.3.jar and commons-logging-1.1.1.jar
API: http://colllib.sourceforge.net/apidoc/
NEW: colllib switches to Java 8 starting with colllib 2.0. If you depend on an older VM-version, please stick to colllib-1.6.