OCTA is an integrated simulation system for soft materials developed by the joint project of industry and academia funded by Ministry of Economy, Trade and Industry(METI), Japan. The objective of the project is to bridge microstructural (or molecular) characteristics of soft materials with their material characteristics by simulation and modeling. This objective was quite challenging... OCTA is a free software for modeling and simulation of Soft Materials (Soft Matter). It is an integrated system for Multi-Scale Simulation, including molecular simulations such as Coarse-Grained Molecular Dynamics, Mean-Field method (Self-Consistent Field Theory), entanglement dynamics of polymer chains (Reptation), colloidal dispersed system, and Finite Element Method for continuum mechanics... In this project, we tried to solve this problem by relying on the power brought by the collaboration of human beings. Rather than producing a software package dedicated to do a limited number of physical..