This is not free software, there is however a limited free version at their website. This is also a potentially huge announcement as Synthedit and Synthmaker are currently the only visual programming languages for vst creation that are up to snuff, that is until this announcement.
Usine 5.70 contains
Create a VST
With this version you can export your workspace into a stand alone application or a VST (a dll), so you can share a redistributable and royalty-free package of your creations.
The package will include all the patches sound files, user modules and a fully functional version of Usine called Usine Reader.
There is a limited free version. That is good as we like the free stuff here at Bitz & Bytes.