RAA - referrercop/1.1.0

ReferrerCop parses Apache log files or AWStats data files and removes entries for referring URLs that match a list of known referrer spammers. It then returns the filtered files via standard output. Run your logs through ReferrerCop either before or after they’re processed by AWStats (or before they’re processed by any other log analyzer) to eliminate annoying referrer spam from your web statistics.

Filtering is performed using a blacklist and an optional whitelist. The lists are simply text files containing domain names, URLs, or regular expressions. ReferrerCop comes with a large, heavily optimized and frequently updated blacklist.

ReferrerCop is extremely fast and uses very little memory; it is capable of filtering files of virtually any size. On my Athlon XP 1800 running FreeBSD 5.4, ReferrerCop is capable of processing about 14,000 Apache log entries per second (your mileage may vary).