A list of free software for modular systems. For those unaware, the items on this list are processing and emulating types of software. Some of the items on here are used for music aps, in the sense that they can add or patch the sound for synthesizers. Others are open-sources where the plugin architecture for the data flow processing. It provides a full control to the plugin architecture for applications that require custom solutions. What's the best part about this software? The beauty of the open-source is that you can modify or change things as you please so they can custom fit to how you want it. Not too bad eh?Some of the software on this are VisualAp, SynFactory and Phonon.