PixInsight - Advanced Image Processing. PixInsight is a modular, open-architecture, portable image processing platform available for FreeBSD, Linux, Mac OS X and Windows. PixInsight is an advanced image processing software platform. It has been designed specifically for astrophotography and other technical imaging fields. PixInsight is a modular, open-architecture system where the entire processing and file handling capabilities are implemented as external installable modules. PixInsight has been ported as a native 64-bit application to FreeBSD, Linux, OS X and Windows operating systems. PixInsight is a strongly multithreaded environment able to exploit all processors and processor cores available on modern hardware. PixInsight is both an image processing environment and a software development framework. The core PixInsight application integrates three user interfaces: a graphical interface, a command-line interface, and a scripting interface based on the JavaScript language. As a development platform, PixInsight provides the PixInsight Class Library (PCL), an ISO C++ framework for development of PixInsight modules, and the PixInsight JavaScript Runtime (PJSR), an ECMA 262-5 compliant environment readily available in the core PixInsight application. The PixInsight project originates from the inside of astrophotography: PixInsight is a software platform made by astrophotographers, for astrophotographers.