The 12.1.3 release is out ad available for download! This is the first major patch release on 12c, as well as more features there is substantial stabilization of features from 12.1.2. There are lots of useful stuff from UI improvements such as model accelerators that create topology items quickly to big data related KMs (SQOOP and more), SQL override capabilities, performance improvements with parallel target tasks capabilities and a tonne of bug fixes.
Check the new features document below which covers at a high level the release;
Madhu also has a blog post below;