Didier DURAND writes "Just published an article about our 100% automated migration from IBM mainframe with Cobol to Linux Java: we could convert of our own application (4 millions line of code) through the tools that we developped.
Those tools are open-sourced under GPL for other companies to benefit from them.
We save 3 millions euros / year after this migration! Please, give our tools a chance to enjoy same benefits."
Link to Original Source