This document presents the work plan for the extension of Work Package 8 ‘Community Code Scaling’, which focuses on the re-design and refactoring of a number of codes for scientific numerical applications, in order to effectively run on coming generations of supercomputing architectures, optimally exploiting their innovative features. The achievements and outcomes of WP8 at the end of its two years programme can be considered excellent. The extension was conceived in order to further enhance the results exploiting the developed competencies, skills and synergies. A subset of codes originally in WP8 that promise further improvements will take part to the extension. Thirteen codes were selected according to the proposed objectives and the available resources. We will give a short introduction to each of the codes, summarizing the main accomplishment in the framework of WP8 and describing the targets for the extension together with the details of the related work plan.