Features:
    * user frienly yet powerfull;
    * fully automatic creation of analytic journal entries for further invoicing;
    * definition of various methodologies - business logic;
    * choose code constructor (Python) for fast deployment or manual expressions for advanced business logic or combine both of them;
    * unlimited count of methodologies per virtual service;

Suitable for billing (non exaustive list):
    * Hosting (e-mail, web-hosting etc.);
    * Utilities;
    * Telecom;
    * Service;