IBIS Development Studio 2.0 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The software lies within Education Tools, more precisely Science Tools.
The default filenames for the program's installer are IBISDS2.exe or IBIS_DS.exe etc. We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software. The actual developer of the free program is Sintecs. The following versions: 2.0 and 1.6 are the most frequently downloaded ones by the program users.
From the developer:
IBIS Development Studio (IBISDS) is capable of viewing, editing and verifying IBIS models. You can view and edit the IBIS model in a graphical or in a text mode, just what you need for your task. The model verification is done using the golden parser (IBIS version 5.0) and can be called directly from the IBISDS user interface.
You may want to check out more software, such as Prithvi Development Studio, Interbase/Firebird Development Studio or Microsoft Robotics Developer Studio 2008 R3, which might be related to IBIS Development Studio.