1 IPA -- Pluggable Accounting System
5 - flexible general purpose accounting system;
6 - supports static and dynamic rules;
7 - supports limits, sublimits and thresholds;
8 - works with external accounting modules;
9 - works with external database modules;
10 - works with external statistics modules;
11 - accounting per specified period of a week.
13 WWW: http://ipa-system.sourceforge.net/