Log analyser for Squid access.log
Screen squid is web-based interface for viewing reports based on Squid proxy server log files. It can be accessed from web-browser through more than 50 reports. No extra files, only DB. All reports generated "on-the-fly".
Skybill is the Perl scripts set for traffic counting at a small enterprise. Those include detalization and aggregation. Web frontend for viewing and limiting is included. It can be used in cionjunction with any log generator, I do with ipacctd and Squid.
Proxy-traffic manager. Defines bytelimit for each real user, and prevent them from downloading more than allowed. Provides friendly (Web) GUI for users and a singe manager. Only squid-proxy supported now!
Universal IP-traffic collector. Can gather data from Cisco IP Accounting / ipcad, Mikrotik, NSG, Revolution routers.