Abstract
ChemoJun, a new open source graphics library for chemical visualization, has been developed and opened to the public. The purpose of the ChemoJun project is to develop a basic technology of chemical software. ChemoJun consists of several basic modules for visualizing chemical information, these modules are used in developing graphical user-interface programs of chemical software, including systems for characterizing and predicting chemical reactivity and for predicting NMR chemical shift values. This paper outlines the ChemoJun project and describes the latest version, 050.