The Siteforum Docfather search engine is now part of the SFS-Software Siteforum Online Enterprise Suite.

The Harvest suites of web crawling and robot spidering tools are no longer being developed. They were some of the first developed in the field, and were widely used in the 1990s for locating and collecting information using multiple standard protocols.

Rutersearch is gone: it was a personal project and is no longer distributed.