Sony courts developers by dropping PlayStation Mobile license fee
As a console, PlayStation has had tremendous success. Even the first mobile foray with the original PSP (PlayStation Portable) was a landmark moment for Sony, but ever since support has waned.
Sony launched “PlayStation Mobile” in November 2012 allowing indie developers to publish games on PlayStation Vita and PlayStation-certified devices (includes their Xperia smartphone range) for a $99/annual license fee, which has now been dropped.
Directly from the announcement