Description (from official homepage http://cband.linux.pl/): mod_cband is an Apache 2 module provided to solve the problem of limiting users' and virtualhosts' bandwidth usage. The current versions can set virtualhosts' and users' bandwidth quotas, maximal download speed (like in mod_bandwidth), requests-per-second speed and the maximal number of simultanous IP connections (like in mod_limitipconn)

mod_cband offers a nice web based overview of used traffic/bandwidth/qoutas and simultaneous connections (look at http://dembol.nasa.pl/cband-status). So we may have the possiblity to limit bandwidth and qoutas in Apache without using traffic counting scripts. If a qouta exceeds you can define what to do (e.g. show an error page or limit the bandwith).