JAP (Java Anon Proxy) is a tool developed in Java, therefore it is multi-platforms, allowing to manage a list of cascading proxies, i.e. a list of servers which are intermediary in order to guarantee the anonymity of the user throughout his/her navigation.
Caution: During some time, the author of this software was forced by the German government to introduce a backdoor to allow navigation espionage. The authors affirm that this backdoor door has been withdrawn, but prudence is necessary.