High Quality Content by WIKIPEDIA articles! MindTouch Core (also known as MindTouch, and formerly known as MindTouch DekiWiki and MindTouch Deki) is a web-based collaboration, wiki software and mashup platform, developed by MindTouch, Inc. It is divided into a front-end (written in PHP) and an API, written in C#. The Deki front-end and API are distributed under the terms of the GNU General Public License while the Dream services layer is released under the Apache License, making it free and open source software.