IT Gesellschaft für lnformationstechnik mbH (IT GmbH) is a software development company located in Kalchreuth near Nürnberg (Germany). Funded 1992, it has been active in KNX software development since the very beginning. This includes development for the KNX association, former ElBA (ETS1, ETS2, ETS3, ETS4, ETS5, MT.) and for several KNX member companies (e.g. Plugins). IT GmbH\'s own product line includes a lot of ETS addons (e.g. reconstruction) as well as other KNX related software (e.g. the Elvis visualization system).