Cisco IP Accounting Fetcher is a set of Perl scripts that allows you to fetch IP accounting data from Cisco routers. It is capable of fetching this information from multiple routers. It summarizes this information on a daily and monthly basis. It optionally generates HTML output with CSS support, and it is able to ignore specific traffic.
vlogger is a logger daemon for Apache. It will accept piped logfile input, split it according to its corresponding virtual host (using a file cache to avoid resource limitations), and write it to disk. It automatically rotates all files and tracks them using timestamps. It is intended as a replacement for cronolog.
mysqmail-qmail-logger is a very small daemon that logs SMTP traffic such as successful delivery and relaying to an SQL database. It splits the information by domain and by users in both the to and from fields, which makes it very easy to count all the SMTP traffic for a given domain name.
mysqmail-qmail-pop3d is a replacement for the qmail standard checkpasswd that does authentication via a MySQL table. When done, it sets up two more environment variables, MYSQMAIL_USERNAME and MYSQMAIL_DOMAINNAME. The mysqmail qmail-pop3d replacement will use these variables to do the traffic accounting in the MySQL table for the account.