apoc.util.sha1([values])

computes the sha1 of the concatenation of all string values of the list

apoc.util.md5([values])

computes the md5 of the concatenation of all string values of the list

apoc.util.sleep({duration})

sleeps for <duration> millis, transaction termination is honored

apoc.util.validate(predicate, message,[params])

raises exception if prediate evaluates to true