- INBOX International is a web development company founded in 2003 that specializes in PHP/MySQL and open source projects like XOOPS and ImpressCMS. - ImpressCMS is an open source community management system forked from XOOPS in 2007, with over 500 commits per month. It uses the Persistable Framework (IPF) to enable rapid module development. - The ImBuilding module allows easy creation of modules for ImpressCMS, taking care of module information, object and field definitions to generate a working module.