YaCy is a search engine that anyone can use to index the Internet (WWW and FTP) or to create a search portal for others (Internet or intranet). The scale of YaCy is limited only by the number of users. and can index billions of web pages. In P2P mode it is fully decentralized. All users of the search engine network are equal and it is not possible for anyone to censor the content of the distributed index.
AnomicFTPD is an RFC959-compliant FTP server with OS- independent user and group management. Active and passive modes, non-root mode, and anonymous and/or read-only modes are supported. A built-in client IP filter acts as a firewall and provides additional access limitation. The server has no online interface; attributes, groups, and user accounts are configured through text files. The protocol/ format-unspecified LIST command produces output that is compatible with most FTP clients, including common Web browsers in FTP mode.
Re: YAcY is a badly behaved robot
Both is not true:
1) YaCy respects the robots.txt since mid of 2005, it never ignored robots.txt on purpose. At this time it was simply the first time implemented.
2) There is no referrer spam. YaCy shows that the page was indexed by a YaCy peer. Since the corresponding web page is referenced then not only by this peer, but by all peers, there must be a central address where a referred page must see that it was referenced by a non-centralized web crawler. This is a unique problem that other centralized crawlers do not have. In this case YaCy is just honest an references to the YaCy project page. This feature was removed with YaCy 0.43 because of too many people had been confused with this referrer.