The current version is 1.9.19 . It talks to the normal news clients, and stores readership data. Fetchnews is the program which gets news from upstream servers and sends your posted articles to the upstream servers. It also can find out which groups you read and gets articles accordingly.
Fetch supports filtering incoming articles for regular expressions.
Texpire is responsible for deleting old and uninteresting news. It deletes all discussion threads that are old and not recently read. Applyfilter applies the contents of your filterfile to articles that you have already retrieved. Checkgroups inserts the titles of newsgroups into the newsgroup database. Newsq shows which news are waiting to be transferred to your upstream server.