This is a distributed web crawler and also a caching HTTP proxy. You are using the online-interface of the application. You can use this interface to configure your personal settings, proxy settings, access control and crawling properties. You can also use this interface to start crawls, send messages to other peers and monitor your index, cache status and crawling processes. Most important, you can use the search page to search either your own or the global index.
Platform:Windows, Linux, Mac OS ;License: GNU GPL
Reference: https://regain.sourceforge.net/